Tuesday, February 28, 2012

Word Parts Quick Reference


Word Parts Quick Reference

from http://www.learnthat.org/pages/view/roots.html


This is the most complete root word list and suffix list on the web, yet it's only a hobby of ours. Our true goal: To provide a complete, full circle vocabulary solution that's effective and fun. We want to make it easy to learn words by heart, so you become truly confident using them.
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Find prefixes and word roots below, listed together alphabetically. Visit our list of suffixes, too!
Variations of word root are listed together, like this: "mater, matri," or like this: arch/i/e/o/ae (may appear as: "arch" or "archi" or "arche" or "archo" or "archae").
We decided to neglect all word roots that only appear in a very limited range of words, since it makes more sense to just learn these words. If you know of a word root that is not listed, but seems to be important, please send us an email.


Link
Root
Meanings
Sample Words and Definitions

a/n
not, without
abyss - without bottom; achromatic - without color; anhydrous - without water

a
on
afire - on fire; ashore - on the shore; aside - on the side

ab/s, a
from, away, off
abduct - carry away by force; abnormal - away from normal, not normal; absent - away, not present; aversion - the act of turning away from; abbreviate: to shorten. 
ac, ad 
to, toward, near
accelerate - to increase the speed of; accessible - easily entered, approached, or obtained; admittance - allowing into; 
acro
top, height, tip, beginning
acrobat - a "high walker"; acronym - a word formed from the first (capital) letters of a word; acrophobia - fear of height
act
do
activity - something that a person does; react - to do something in response; interaction - communication between two or more things 
aer/o
air
aerate - to let air reach something; aerial - relating to the air; aerospace - the air space
agr/i/o
farming
agriculture - management of the land, agribusiness - making money by utilizing land; agrarian - relating to the management of land
alg/o
pain
neuralgia - pain caused by a nerve; analgesic - a drug that makes one pain free; nostalgia - aching for the familiar
ambi, amphi
both, on both sides, around
ambidextrous - able to use both hands equally; ambiguous - having more than one meaning; ambivalence - conflicting or opposite feelings toward a person or thing
ambul
walk, move
amble - to walk in a slow, relaxed way; ambulant - walking or moving around; ambulance - a vehicle that moves a patient
ami/o
love
amiable - friendly, pleasant, lovable; amity - friendly and peaceful relations; amorous - showing romantic love
ana
up, back, against,
again, throughout
analysis - a close examination of something; anatomy - the structure of something as visible when cut up for analysis; anachronism - not being in the right place in time
andr/o
man, male
androgynous - being both male and female; android - resembling a human; misandry - hatred towards men 
anim
life, spirit
animal - a living organism; animate - to make alive; equanimity - of balanced spirit
ann/enn
year
anniversary - a date observed once a year; annual - happening once a year; millennium - 1,000 years
ante
before, in front
antecede - to come before something in time; antemeridian - before noon; anteroom- a small room before the main room
anth/o
flower
chrysanthemum and amaranth - names of flowers; anthology - a collection of treasured writings; anthozoan - half plant, half animal, like anemones and corals.
anthrop/o
human
anthropology - the study of mankind; anthropomorphism - giving human form to non-human things; philanthropy - the love to mankind (expressed through good deeds)
anti
against, opposite of
antibody - a substance that destroys micro-organisms; antiseptic - preventing infection;  antisocial - opposing social norm
apo, apho
away, off, separate
aphorism - a short expression of a general truth; apology - an explicit expression of regret, apostrophe - a small dash used in place of an omitted letter 
aqu/a
water
aquarium - a water container for fish; aquatic- relating to water; aqueduct - a pipeline for water
arbor
tree
arborist - someone working with trees; arbor - a shady area formed by trees; arborous - having many trees
arch/i
chief, most important, rule
archbishop - the highest ranking bishop; archenemy - chief or worst enemy; matriarch - a female who rules a group; monarch - a king or queen
arch/a/i
primitive, ancient
archaeology - the study of ancient cultures; archaic - belonging to an earlier period; archive - a collection of historical materials
arthr/o
joint
arthroscope - a tool to see inside a joint; arthritis - inflammation of a joint; arthropod - invertebrates with jointed legs, like spiders, crustaceans, insects
art
skill
artifact - object made by a person's skill; artisan - a person skilled in a craft; artist - a person who creates skillfully
astro,
aster
star, stars, outer space
astronaut - a person traveling to the stars; astronomer - someone who studies the stars; asterisk - a star-shaped sign used as a reference tool
aud/i/io
hear
audible - loud enough to be heard; audience - people who listen to a program; audiovisual - relating to sound and vision
auto
self, same, one
autocrat - a person who governs with absolute power; autograph - a person's own signature; automatic - moving by itself
avi/a
bird
aviary - a large enclosure for birds; aviatrix - a female airplane pilot; aviation - the art of designing or operating aircraft
bar/o
pressure, weight
baric - pertaining to pressure, esp. of the atmosphere;  milliard - metric unit, equal to 1/1000th of a bar; baryon - heavy elementary particle
bell/i
war
bellicose - warlike; belligerent - hostile, ready to fight; rebel - person who opposes and fights
bene
good, well
benefactor - person who gives money to a cause; beneficial - producing a good effect; benevolent - showing kindness or goodwill 
bi/n
two, twice, once in every two
biannual - happening twice a year; binoculars - optical device with two lenses; bilateral - of or involving two sides
bibli/o
book
bibliography - a list of books used as sources; bibliomania - an extreme love of books; bibliophile - a person who loves books
bio
life, living matter
biography- a life story written by another person; biology - the science of life; biosphere - Earth's surface inhabited by living things
blast/o
cell, primitive, immature cell
blastula - an early stage of embryonic development; fibroblast - a cell that forms connective tissue; blastoderm - the layer surrounding the inside of an egg
capt, cept, ceive
take, hold
intercept - to stop or interrupt;perceive - to take notice of something; captivating - taking hold of
cardi/o
heart
cardiac - relating to the heart; cardiogenic - resulting from heart disease; cardiologist - a heart doctor
carn/i
flesh, meat
carnivorous - flesh-eating; carnal - pertaining to the body or flesh; incarnate - given bodily form
cata
down, against
completely,  intensive,
according to
cataclysm - a flood or other disaster, catalog - a complete listing; catastrophe - turning for the worst, a substantial disaster
caust,
caut
to burn
cauterize - to burn with a hot instrument; caustic - capable of burning or eating away; holocaust - total devastation, especially by fire 
cede,
ceed,
cess
go, yield
exceed - to go beyond the limits;  recede - to go back; accessible - easily entered, approached, or obtained; 
celer
fast
accelerate - to increase the speed of; decelerate - to reduce the speed of
cent/i
hundred, hundredth
centennial- the 100th anniversary; centimeter - 1/100 of a meter; century - 100 years
centr/o/i
center
egocentric - self-centered; eccentric - not having a common center, not according to norm; centrifugal - moving outward from a center
cephal/o
head
encephalitis - inflammation of the brain; cephalic - pertaining to the head; cephalopod - marine mollusks like octopus and squid who have tentacles growing from their head
cerebr/o
brain 
cerebral - pertaining to the brain; cerebrate - to use the brain; cerebrospinal - pertaining to the brain and the spinal cord
cert
sure
ascertain- to find out something with certainty; certain - being absolutely sure; certify - to state that something is true
chrom/o chromat/o, chros
color, pigment
achromatic - without color; chromium - a blue-white metallic chemical element, chromatics - the study of color
chron/o
time
chronic - lasting for a long time; chronological - arranging events in time order, synchronize - happening at the same time
chrys/o
gold, yellow
chrysanthemum and helichrysum - golden/yellow flowers; chrysolite - a yellowish gem
cide, cise
cut, kill
homicide - murder; incisor - a sharp tooth for cutting food; insecticide - a chemical used to kill insects
circum,
circle
around, about
circumnavigate - to sail around; circumscribe - to draw around; circumspect - looking around
claim, clam
shout, speak out
clamor - to shout and make noise; exclaim - to cry out loudly and suddenly; proclamation - something announced officially in public 
clar
clear
clarification - an explanation; clarify - to make something clear; declare - to state something clearly
clud, clus
close
conclusion - the end or last part; exclusion - shutting out, rejecting; seclude - to keep away from; to isolate
cline
lean
inclination - a leaning toward; incline - a surface that slopes or leans; recline - to lean back and relax
co
with, together, joint
coauthor - writer who collaborates with another author; coeducation - educating males and females together; cohousing - planning your neighborhood in an intentional neighborly fashion
col
together, jointly
Collaborate - to work together; collision - smashing together; colloquial - words formed by everday interaction
com
together, common
commemorate - to memorize together; composition - an arrangement or putting together of parts; commune - living together while owning things in common
cogn/i
know
cognition - process of acquiring knowledge;  incognito - disguised so no one knows you; recognize - to discover that one knows
con
with, jointly
concur - to agree with someone; contemporary - of the same time period as others; convention - a gathering of people with a common interest
contra/o
against, opposite
contradict to argue against, Contraflow, contraception, contrary not in agreement, controversy disagreement
corp/o
body
corporation - a company recognized by law as a single body; corpse - a dead body; corporal - pertaining to the body
cosm/o
universe
cosmonaut - a Russian astronaut; cosmos - the universe; microcosm - a miniature universe
counter
opposite, contrary, opposing
counteract - to oppose the effects of an action; countermand - to cancel a previous order; counteroffensive - attack against an attack
cranio
skull
craniology - the study of skull characteristics; cranium - skull of vertebrates; cranial - pertaining to the skull
cred
believe
credence - belief that something is true or valid; credulous - believing things too easily, gullible; incredible - unbelievable
crypto
hidden, secret
cryptic - of hidden meaning; cryptography - science of secret codes; encrypt - encode into secret code
cumul
mass, heap
accumulate - to gather or pile up; cumulative - gradually building up 
cycl
circle, ring
bicycle - a vehicle with two wheels; cycle - a sequence that is repeated; cyclone - a storm with circling winds
de
reduce, away, down, remove
decelerate - to slow down, reduce speed; dethrone - to remove from power; debug - to remove bugs 
dec/a,
deka
ten
decade - 10 years; decathlon - athletic contest that includes 10 disciplines in which each participant competes; December - formerly the 10th month of the Roman calendar
deci
one tenth
deciliter - a tenth of a liter; decimate - reduce dramatically; decibel - one tenth of the sound volume unit bel
dem/o
people
democracy - government of the people; demographic - the study of people; epidemic - spreading among people in a region
demi
half, less than
demitasse - a small cup of coffee; demimonde - someone of little respected life style
dendr/o/i
tree
philodendron - a climbing plant that grows on trees; dendrochronology - dating events by studying growth rings in trees; dendriform - in the shape of a tree
dent, dont
tooth
dental - relating to teeth; dentist - a doctor for the teeth; dentures - a set of false teeth
derm/a
skin
dermatologist - a doctor for the skin; pachyderm - a class of animals with very thick skin (elephant, rhinoceros); dermatitis - inflammation of the skin
di/plo
two, twice
dichromatic - displaying two colors; diploma - a certificate, literally "a letter folded double"; dilemma - a situation that requires a choice between two alternatives.
di/s
apart, away,
not, to the opposite
digression - a departure from the main issue, subject; disappear - to move out of sight; dissect - to cut apart piece by piece.
dia
through, between,
apart, across
diabetes - disease characterized by excessive thirst and discharge of urine; diagnosis - understanding a condition by going through a detailed review of symptoms; dialog - conversation between two people.
dict
speak
contradict - to express the opposite of; prediction - a statement foretelling the future; dictate - to speak out loud for another person to write down.
domin
master
dominate - to be the master of; domineering - excessively controlling; predominate - to have more power than others
don/at
give
donation - a contribution or gift; donor - someone who gives something; pardon - to give forgiveness for an offense
duc/t
lead
conduct - to lead musicians in playing music; educate - to lead to knowledge; deduction - a subtraction of an amount.
du/o
two, twice
duplicate - make an identical copy; duet - a musical composition for two voices or instruments; duo - a pair normally thought of as being together. 
dur
harden, to last, lasting
durable - having the quality of lasting; duration - the length of time something lasts; enduring - able to last. 
dyn/a/am
power, energy, strength
dynamo - a generator of energy; dynamic - having physical energy/power; dynamite - a powerful explosive.
dys
abnormal, bad
dyspepsia - abnormal indigestion; dystopia - an imaginary place of total misery; dyslexia - impairment of the ability to handle words. 
e-
out, away
eloquent - speaking beautifully and forcefully; emissary - a representative of a country or group sent on a mission; eject - throw out forcefully.
ego
self
egoistic - self-centered; alter ego - a higher aspect of oneself; egomania - excessive preoccupation with oneself.
em, en
into, cover with, cause
empathy - intention to feel like another person; empower - put into power; engorge - make larger.
endo
within, inside
endotherm - a creature that can keep its inside temperature fairly constant; endocrine - relating to glands that secrete directly into the blood or lymph; endogamy - the custom to marry within one's clan, tribe etc.
enn/i, anni
years
bicentennial - of or relating to an age or period of 200 years; centennial - of or relating to an age or period of 100 years;  perennial -lasting through many years.
en, in
inside, inwards
envision - to picture in the mind; enclose - lock inside; inwards - towards the inside.
ep/i
on, upon, over,
among, at, after,
to, outside 
epidemic - the rapid spread of something negative; epilogue - a short speech delivered after a play; epicenter - the center of an earthquake.
equ/i
equal, equally
equidistant -  an equal distance from two points; equanimity - calm temperament, evenness of temper; equation - a statement of equality.
erg/o
work
ergonomics - study of the working environment; energy - the power to accomplish work; energetics - science that looks at energy and its transformation.
esth/aesth
feeling, sensation, beauty
esthetician - someone who beautifies; aesthetic - pertaining to a sense of beauty; kinesthesia - the sensation of bodily movement.
ethno
race, people
ethnic - pertaining to a defined group of people; ethnocentric - focusing on the ethnicity of people; ethnology - the science of people and races.
eu
good, well
euphemism - replacing an offensive word with an inoffensive one; euphonious - having a pleasant sound; euphoria - feeling of well-being. 
ex
from, out,
excavate - to dig out; exhale - to breathe out; extract - to pull out.
extra, extro
outside, beyond
extraordinary - beyond ordinary; extraterrestrial - outside the Earth; extrovert - an outgoing person. 
fac/t
make, do
artifact - an object made by a person; factory - a place where things are made; malefact - a person who does wrong.
fer
bear, bring, carry
confer - to bring an honor to someone; ferry - a boat that carries passengers; transfer - to move to another place.
fid
faith
confide - place trust in someone, fidelity - faithfulness; fiduciary - a trustee;
flect
bend
deflect - to bend course because of hitting something; inflection - a bending in the voice's tone or pitch; flexible - easily  bending.
flor/a,
fleur
flower
florist - someone working with flowers; floral - flowerlike; flora - the plant life of a particular time or area
for
completely (used to intensify
the meaning of a word)
forsaken or forfeited - completely lost; forgiven - completely given (a release of debt).
fore
in front of, previous, earlier
forebear - ancestor; forebode - to give an advance warning of something bad; forecast - a preview of events to be.
fract, frag
break
fracture - a break; fragile - easy to break; fragment or fraction - a part or element of a larger whole; 
fug
flee, run away, escape
fugitive - a person who is running away; refuge - a sheltered place to flee to; refugee - a person seeking protection
funct
perform, work
defunct - no longer working or alive; function - to work or perform a role normally; malfunction - to fail to work correctly.
fus
pour
confusion - being flooded with too much information that is hard to make sense of; fuse - to melt by heating; infuse - to put into.
gastr/o
stomach
gastric - pertaining to the stomach; gastronomy - serving the stomach by providing good food; gastritis - inflammation of the stomach.
gen/o/e/
genesis
birth, production,
formation, kind
genealogy - the study of the history of a family; generation - all the people born at approximately the same time; genetic -relating to heredity encoded in the genes.
geo
earth, soil, global
geography - study of the earth's surface; geology - study of the structure of the earth; geoponics - soil based agriculture.
ger
old age
geriatrics - medicine pertaining to the elderly; gerontocracy - the rule of the elders; gerontology - the science of aging.
giga
a billion
gigabyte - unit of computer storage space; gigahertz - unit of frequency (one billion Hz/sec); gigawatt unit of electric power (one billion watts).
gon
angle
decagon - a polygon with 10 angles; diagonal - a slanting line running across a space; octagon - a geometrical figure with 8 angles.
gram
letter, written
diagram - a simple drawing; grammar - rules of how to write words in sentences; telegram - a message sent by telegraph.
graph/y
writing, recording, written
Graphology - the study of handwritings; autograph - written with one's own hand; seismograph - a machine noting strength and duration of earthquakes.
grat
pleasing
gratify - to please someone; grateful - feeling thankful;  gratuity - a tip, token of appreciation.
gyn/o/e
woman, female
gynecology - the science of female reproductive health; gynephobia - fear of women; gynecoid - resembling a woman. 
gress, grad/e/i
to step, to go
digression - a departure from the main issue, subject, etc.; progress - movement forward or onward; gradual - step by step.
hect/o, hecat
hundred
 hectoliter - 100 liters; hectare - metric unit equaling 100 ares or 10,000 square meters; hectometer - 100 meters.
helic/o
spiral, circular
helicopter - an aircraft with horizontal rotating wing; helix - a spiral form; helicon - a circular tuba.
heli/o
sun
heliotropism - movement or growth in relating to the sun; heliograph - apparatus used to send message with the help of sunlight; helianthus - genus of plants including sunflowers.
hemi
half, partial
hemicycle - a semicircular structure; hemisphere - one half of the earth; hemistich - half a line of poetry.
hem/o/a
blood
hemorrhage - clotting of the blood; hemorrhoids - swelling of the blood vessels; hemoglobin - red blood particle. 
hepa
liver
hepatitis - inflammation of the liver; hepatoma - a tumor of the liver; hepatotoxic - toxic and damaging to the liver.
hept/a
seven
heptagon - a shape with seven angles and seven sides; Heptateuch - the first seven books of the Old Testament; heptameter - a line of verse consisting of seven metrical feet.
herbi
grass, plant
herbicide - any chemical used to kill unwanted plants, etc.; herbivorous - plant-eating; herbal - relating to plants.
hetero
different, other
heterogeneous - made up of unrelated parts; heteronyms - words with same spelling but different meanings; heterodox - not conforming to traditional beliefs.
hex/a
six
hexagon - a shape with six angles/sides; hexameter - a verse measured in six; hexapod - having six legs.
histo
tissue
histology - study of the microscopic structure of tissues; histochemistry - study of the chemical constitution of cells and tissues.
homo,
homeo
like, alike, same
homogeneous - of the same nature or kind; homonym - sounding alike; homeopath - a therapy that is based on treating "same with same"
hydr/o
liquid, water
hydrate - to add water to; hydrophobia - intense fear of water; hydroponics - growing plants in liquid nutrient solution; hydraulic - operated by force created by a liquid.
hygr/o
moisture, humidity
hygrometer - tool used to measure humidity; hygrograph - instrument for recording variations in atmospheric humidity.
hyper
too much, over,
excessive, beyond
hyperactive - very restless; hypercritical - too critical; hypertension - above normal pressure.
hyp/o
under
hypoglycemia - an abnormally low level of sugar in the blood; hypothermia - abnormally low body temperature; hypothesis - a theory that is unproven but used under the assumption that it is true.
iatr/o
medical care
geriatrics - medical care of the elderly; pediatrician - a doctor who treats children; podiatry - medical care for feet.
icon/o
image
icon - an (often religious) image, in modern usage a simplified graphic of high symbolic content; iconology - science of symbols and icons; iconoclast - someone who destroys religious images and traditional beliefs. 
idio
peculiar, personal, distinct
idiomatic - Peculiar to a particular language; idiosyncracy - a physical or mental characteristic typical or a particular person;  idiot - someone who is distinctly foolish or stupid.
il, in 
in, into
illuminate - to give light to; innovation - a new idea, method, or device; inspection - the act of examining or reviewing.
ig, il, im,
in, ir
not, without
illegal - not legal; impossible - not possible; inappropriate - not appropriate; irresponsible - not responsible.
imag
likeness
image - a likeness of someone; imaginative - able to think up new ideas or images; imagine - to form a picture or likeness in the mind.
infra
beneath, below
infrastructure - underlying framework of a system; infrared - below the regular light spectrum.
inter
between, among, jointly
international - involving two or more countries; intersection - place where roads come together; intercept - to stop or interrupt the course of.
intra,
intro
within, inside
intrastate - existing in one state; intravenous - inside or into a vein; introvert - shy person who keeps within him/herself.
ir
not
irredeemable - not redeemable; irreformable - not reformable; irrational - not rational.
iso
equal
isobar - a line on a map connecting points of equal barometric pressure; isometric - having equality of measure; isothermal - having equal or constant temperature.
ject
throw
eject - to throw someone/something out; interject - to throw a remark into a discussion; project - to cast or throw something.
jud
law
judgment - a decision of a court of law; judicial - having to do with judges or courts of law; judiciary - a system of courts of law.
junct
join
conjunction - a word that joins parts of sentences; disjunction - a disconnection; junction - a place where two things join.
juven
young
juvenile - youthful or childish; rejuvenate - to bring back to youthful strength or appearance. 
kilo
thousand
kilobyte - 1,000 bytes; kilometer - 1,000 meter; kilograms - 1,000 grams.
kine/t
/mat
motion, division
kinetics - study of the force of motion; psychokinesis or telekinesis - the ability to move objects with your mind; cinematography - motion picture making.
lab
work
collaborate - to work with a person; elaborate - to work out the details; laborious - requiring a lot of hard work.
lact/o
milk
lactate - to give milk, nurse; lactose - the sugar contained in milk; lactic acid.
later
side
bilateral - of or involving two sides; unilateral - affecting one side of something. 
leuk/o,
leuc/o
white, colorless
leukemia - abnormal increase of white blood cells in the blood; leukocyte - a mature white blood cell; leucine - a white, crystalline amino acid.
lex
word, law, reading
lexicology - the study and history of words; alexia -loss of the ability to read; illegal - not authorized by the official rules or laws.
liber
free
liberate - to set free; libertine - a person with a free, wild lifestyle; liberty - freedom.
lingu
language, tongue
linguist - one who studies languages; multilingual - able to communicate in multiple languages; linguine - long, flat "tongue-shaped" pasta.
lip/o
fat
liposuction - the mechanical removal of fat reserves in the tissue; lipase - enzyme that breaks down fat; lipoid - resembling fat. 
lite, ite,
lith/o
mineral, rock, fossil
apatite - a group of common minerals; granite - a hard, granular rock; monolith - a remarkable, unique stone.
loc
place
dislocate - to put something out of its usual place; location - a place;  relocate - to move to a new place.
log/o
word, doctrine, discourse
logic - correct reasoning; monologue - a long speech by one speaker;analogy - similarity, especially between things otherwise dissimilar.
loqu, locu
speak
eloquent - speaking beautifully and forcefully ; loquacious - very talkative; elocution - art of public speaking. 
luc
light
elucidate - to explain, to throw light on; lucid - easily understood, giving off light; translucent - allowing light through.
lud, lus
to play
prelude - introduction to the major performance;  illusion - misleading optical image or impression; delude - to mislead, deceive.
lumin
light
illuminate - to fill with light; lumen - unit measuring light.
lun/a/i
moon
lunar - relating to the moon; lunarscape - the surface of the moon; lunatic - insane (as if driven mad by the moon).
macro
large, great
macroevolution - large scale evolution; macromolecule - a large molecule; macroeconomics - study of the overall forces of economy.
magn/a/i
great, large
magnify - make larger; magnificent - grand; magnate - a powerful person, especially in business or industry.
mal/e
bad, ill, wrong
malcontent - wrong content; malaria - "bad air", infectious disease thought to originate from the "bad air" of the swamps, but caused by the bite of an infected mosquito; malicious - showing strong ill will.
man/i/u
hand
maneuver - to move by hand; manual - done with the hands; manuscript - a book written by hand.
mand
to order
command - an order or instruction; demand - a hard-to-ignore order; mandate - an official order.
mania
madness, insanity,
excessive desire
bibliomania - a crazy love of books; egomania - a mad love of oneself; maniac an insane person.
mar/i
sea
marina - a harbor for pleasure boats; maritime - relating to the sea; submarine - an undersea boat; aquamarine - color of sea water.
mater,
matr/i
mother
maternal - relating to motherhood; maternity - the state of being a mother; matriarch - a woman head of a household.
max
greatest
maximal - the best or greatest possible; maximize - to make as great as possible; maximum - the greatest amount.
medi
middle
medieval - pertaining to the Middle Ages; medium - in the middle; mediocre - only of medium (inferior) quality.
mega
great, large, million
megalopolis - an area with many nearby cities; megaphone - a device that projects a loud voice; megastructure - huge building or other structure.
melan/o
black
melancholy - a state of dark emotions; melanoma - malignant dark tumor of the skin; melodrama - a dark, pathetic drama.
memor/i
remember
commemorate - to honor the memory of, as by a ceremony; memorial - related to remembering a person or event; memory: an ability    to  retain knowledge or an individual's stock of retained knowledge.  
merge,
mers
dip, dive
immerge or immerse - to put or dip something into a liquid; submerge to dip something completely into wate.r
meso
middle
Mesoamerica - Middle America;  meson - elementary particle with a mass between an electron and a proton.
meta
change, after, beyond, between
metaphysics - study of nature and reality; metamorphosis - a complete change of form; metastasis - the transmission of disease to other parts of the body.
meter,
metr/y
measure
audiometer- an instrument that measures hearing acuteness; chronometer- an instrument that measures time; metric - measured.
micro
very small, short, minute
microbe - a very small living thing; microchip - a tiny wafer with an integrated circuit; microscope - a device to see very small things.
mid
middle
midriff - the area between the chest and the waist; midterm - middle of a term in school; midway - halfway between.
migr
move
immigrant - a person who moves to a new country to settle; migrant - person who moves from place to place; migration - the process of moving.
milli
onethousandth
millimeter - one thousandth of a meter; millibar - one thousandth of a bar; milliliter - one thousandth of a liter.
min/i
small, less
mini - something that is very small; minuscule - extremely tiny; minutiae - very small or trivial details.
mis/o
bad, badly, wrong, wrongly,
to hate
misbehave - to behave badly; misprint - an error in printing; misnomer - an error in naming a person or thing.
miss, mit
send, let go
dismiss - to send someone away; missile - a weapon sent into the air; emit - to send something out; admittance - entry.
mob
move
immobilize - to stop from moving; mobile - able to move freely; mobility - the quality of being able to move.
mon/o
one, single, alone
monochromat - having one color; monologue - a speech spoken by one person; monotheism - belief in one god.
mot, mov
move
motion - the act of moving; motivate - to move someone to action; promote to move someone forward; removable - able to be taken or carried away.
morph/o
form
metamorphosis - complete change of form; endorphins - chemical in the brain able to transform pain; amorphous - without distinct shape or form.
mort
death
immortal - living forever, unable to die; mortal - certain to die; mortician - an undertaker.
multi
many, more than one or two
multicolored - having many colors; multimedia - using a range of media; multitasking - doing many things at once.
mut
change
immutable - not changing; mutant - an organism that has undergone change; mutate - to undergo a change.
my/o
muscle
myocardium - the middle muscle of the heart; myasthenia - muscle fatigue or weakness; myosin - common protein in muscle tissue.
narr
tell
narrate - to tell a story; narrative - a story; narrator - a person who tells a story.
nat
born
innate - included since birth; natal - relating to birth; natural - gotten at birth, not afterward.
nav
ship
circumnavigate - to sail around a place; naval - relating to a navy or warships; navigate - to sail a ship through a place.
necr/o
dead, death
necrophil - loving death; necrosis - the death of tissue due to disease or injury; necrology - a list of persons who have recently died.
neg
no
negate - to say it didn't happen; negative - meaning "no"; renege - to go back on a promise.
neo
new, recent
neoclassic - a revival of classic form, neocolonialism - the indirect ("new") economical and political control of a region by a more powerful foreign power; neonatal - a newborn child, especially the first few weeks.
nephr/o
kidney
nephritis - inflammation of the kidneys; nephrotomy - surgical incision of a kidney; nephron - a single, excretory unit in the kidney.
neur/o
nerve
neuralgia - pain along a nerve; neurologist - doctor specializing in the nerves; neurotic -  mental disorder that usually does not include an impaired perception of reality.
nom/in
name
misnomer - an error in naming a person or thing; nominal - being something in name only but not in reality; nominate - to name for election or appointment, to designate.
non
no, not, without
nondescript - with no special characteristics; nonfiction - true, real, not made-up; nonsense - without sense.
not
mark
notable - marked as worthy of attention; notarize - to certify a signature on a legal document; annotate - to add remarks.
noun,
nunc
declare
announce - to declare in public; denounce - to proclaim harsh criticism; enunciate - to speak or declare something clearly.
nov
new
innovate - to introduce a new way; novelty - something new; novice - a person who is new at a job; renovate - to make something like new again.
numer
number
enumerate - to name a number of items on a list; numerology - the study of magical uses of numbers; numerous - a large number.
ob, op
in the way, against
object - to be against something; obscure - hard to understand; opposition - the act of resistance or action against.
oct/a/o
eight
octagon - a figure with 8 sides and 8 angles; octogenarian - person in his or her 80s; octopus - sea animal with 8 arms.
ocu
eye
binoculars - lens device for seeing distances; monocula - relating to one eye; oculist - an eye doctor.
omni
all
omnipotent - with all the power; omniscient - knowing all things; omnivorous eating all foods.
op/t/s
eye, visual condition, sight
optic - relating to the eyes; optician - a person who fits eyeglasses; autopsy - the examination of a dead body.
opt
best
optimal - the best, the most desirable; optimize - to make the best of; optimum - the best something could be.
ortho
straight
orthodontist - a dentist that straightens teeth; orthopedic - a doctor concerned with the proper alignment of the bones; orthography - the correct way of writing.
osteo
bone
osteoarthritis - inflammation caused by degeneration of the joints; osteopathy - therapy that uses among others manipulation of the skeleton to restore health; osteology - the study of bones.
out
goes beyond,
surpasses, exceeds
Outgoing - being of lively, sharing nature; outdoing - doing better than; outdoor - outside.
over
excessive
overconfident - more confident than is appropriate; overstock - more supplies than is desirable; overexcited - ,more excited than one should be.
oxy
sharp
oxymoron - combining two ideas that sharply contradict each other; oxydize - corrode a surface.
pale/o
ancient
paleontology - study of ancient fossils; paleography - the study of ancient forms of writing; Paleolithic - period of the Stone Age.
pan
all, any, everyone
panacea - a cure for all diseases or problems; panorama - an all-around view; pantheism - the worship of all gods; pandemic - affecting all.
para
beside, beyond, abnormal,
assistant
parasite - an organism that lives on and off another living being; parallel - alongside and always an equal distance apart; paragraph - a portion of a writtenn document that presents a distinct idea.
para
protection from
parachute - protection from falling; parasol - an umbrella used to protect from the sun; 
pater,
patr/i
father
paternal - relating to fathers; paternity - fatherhood; patriarch - a man who rules a group.
path
feeling, emotion
antipathy - a feeling of great dislike; apathy - a lack of feeling or interest; empathy - ability to understand another's feelings.
ped/i/e
foot, feet
pedal - a lever pushed by the foot; pedestrian - one who walks; pedicure - cosmetic treatment of feet and toes.
pel
drive, force
compel - to force someone to act; expel - to drive someone out of a place; repel - to force back.
pent/a
five
pentagon - shape having 5 angles and 5 sides, pentagram - a five-pointed star formerly used as a symbolic figure in magic; pentathlon - an athletic contest that includes five events.
pept,
peps
digestion
dyspepsia - abnormal digestion; peptic - aiding digestion; pepsin - a digestive enzyme.
per
through, throughout
permanent - lasting throughout all time; permeate - to spread throughout; persist - to continue for a long time; perennial - lasting through many years.
peri
around, enclosing
periodontal - pertaining to bone and tissue around a tooth; peripheral - lying outside of the center;  perimeter - the outer boundary of an area.
phag/e
to eat
esophagus - muscular tube that carries food to the stomach; anthropophagy or sarcophagy - cannibalism; xylophagous - feeding on wood.
phil/o
love, friend
philanthropist - one who loves humanity;  philology - the love of words; philosophy - the love of wisdom; bibliophil - loving books. 
phon/o
/e/y
sound
cacophony - loud, unpleasant sounds; microphone - a device that records and amplifies sound; phonetic - relating to human speech sounds.
phot/o
light
photogenic - caused by light; photograph - image made on light-sensitive film; photon - the smallest possible unit of light.
phyll/o
leaf
chlorophyll - a group of green pigments found in leaves; phyllotaxis - the arrangement of leaves on a stem; phyllite - a rock that forms sheets, similar to slate.
phys
nature, medicine, the body
physical - relating to the body; physician - a doctor; physique - nature and shape of one's body.
phyt/o/e
plant, to grow
epiphyte - a plant growing independently on the surface of another; hydrophyte - a plant that grows only in water; neophyte - a beginner, especially a person recently converted to a new belief.
plas/t/m
to form, development,
forming cells
protoplasm - something that is the first made or formed, also the living portion of a cell; plastic - able to be formed, especially when warm; plaster - a mixture of lime, sand and water that forms a smooth solid covering for walls. 
pneum/o
breathing, lung, air, spirit
pneumonia - inflammation of the lungs; pneumatic - using the force of air; dyspnea - difficulty breathing.
pod/e
foot
podiatrist - a doctor for the feet; podium - a small platform to stand on; tripod - a stand or frame with 3 legs.
poli
city
metropolis - a large city; police - people who work for the government to maintain order in a city; politics - actions of a government or political party.
poly
many, more than one
polychrome - with many colors; polyglot - a person fluent in many languages; polygon - shape with 3 or more straight sides.
pon
place, put
opponent - a person who places him/herself against an action, idea, etc.; postpone - to put off doing something.
pop
people
popular - appealing to a lot of people; population - all of the people who live in a particular area; populist - a supporter of the rights of people.
port
carry
export - to carry goods out of a place to another; portable - able to be carried; porter - a person who carries luggage.
pos
place, put
deposit - to place or drop something; expose to place out into the open for all to see; position - the place where someone is.
post
after, behind
posthumous - after someone's death; postpone - to delay something;  postscript - an addition to an already completed document.
pre
earlier, before, in front of
preamble - a part in front of a formal document; prepare - to get ready in advance; prediction - a statement foretelling the future.
pro
before, in front of,
for, forward
prognosis - a prediction of what will happen; prologue - a passage before the main part; prophet - a person who foretells the future.
prot/o
primitive, first, chief
prototype - the first of a kind; proton - on of the very basic parts of an atom; protocol - a first draft from which a document is prepared.
pseud/o
wrong,false
pseudonym - a fictitious name; pseudoscience - theories presumed without proof of a scientific nature; pseudopregnancy - a false pregnancy.
psych/o
mind, mental
psyche - the human spirit or soul; psychic - relating to the human mind or someone who has supernatural mental abilities; psychology - the study of the mind.
pugn/a,
pung 
to fight
pugnacious - having a quarrelsome or aggressive nature; repugnant - distasteful, offensive or revolting; pungent - piercing.
pul
urge
compulsion - a very strong urge; expulsion - to someone out; impulsive - having a spontaneous urge to do something.
purg
clean
purge - remove anything undesirable; purgatory - according to Roman Catholics a place where souls must clean themselves of sin; expurgate - remove objectionable passages from a publication.
put
think
computer - an electronic thinking device; dispute - to disagree with what another person thinks; input - contribution of one's thinking.
pyr/o
fire, heat
pyrotechnics - the art of making fireworks; pyrometer - a thermometer for measuring high temperature; pyretic - relating to or producing fever. 
quad/r/ri
four
quadrant - open space with buildings on 4 sides; quadrennium - period of 4 years; quadruped - a 4-footed animal.
quart
fourth
quarter - one fourth; quart - a fourth of a gallon; quartet - a musical composition or group involving 4 voices or instruments.
quin/t
five, fifth
quintett - a composition for 5 voices or instruments; quintessence - pure essence, based on the ancient philosophy that there was a fifth element that was present in all things; quintuple - fivefold.
radic, 
radix
root
eradicate - pull out at the roots; radical - fundamental, looking at things from a drastic point of view; radish - an edible root of the mustard family.
radio
radiation, ray
radioactive - emitting radiation; radiologist - someone diagnosing or treating via radiation. 
ram/i
branch
ramification - the resulting consequence of a decision; ramify - to spread or branch out; ramus - a branchlike part.
re
again, back, backward
rebound -to spring back again; rewind - to wind something backward; reaction: a response; recognize: to identify someone or something seen before.
reg
guide, rule
regent - a person who rules on behalf of a king or queen; regime - a government that rules; regulate - to apply a rule.
retro
backward, back
retroactive - relating to something in the past; retrogress - to go back to an earlier condition; retrospect - the remembering of past events.
rhin/o
nose
rhinoceros - a species of animals with a big horn on the snout; rhinoplasty - surgery of the nose; rhinovirus - viruses that are causing the common cold.
rhod/o
red
rhododendron - a flower with red/pink flowers; rhodium - an element which produces a red solution; rhodopsin - a purple pigment in the retina that is needed for vision.
rid
laugh
deride - to make fun of someone; ridicule - to make fun or mock; ridiculous - silly, causing laughter.
rrh/ea
/oea/ag
flow, discharge
diarrhea - abnormally excessive bowl movement; hemorrhage - heavy blood flow; catarrh - inflammation of a mucous membrane, especially the nose and throat. 
rub
red
ruby - deep red color and a precious stone of the same color; rubella - measles; bilirubin - reddish pigment in bile.
rupt
break, burst
bankrupt - unable to pay because you're "broke"; interrupt - to break into a conversation or event, to disturb; rupture - a break in something.
san
health
sane - mentally healthy; sanitary - relating to cleanliness and health; sanitation - maintenance of public health and cleanliness.
scend
climb, go
ascend - to climb upward; crescendo - a climbing up of the volume of music; descend - to go or climb down.
sci
know
conscience - sense of knowing right from wrong; conscious - knowing what is happening; omniscient - knowing everything.
scler/o
hard
arteriosclerosis - hardening of the arterial walls;  multiple sclerosis - disease which causes the tissue of the brain and spinal cord to harden; sclerometer - instrument for measuring hardness.
scop/e/y
see, examine, observe
microscope - a device used to see tiny things; periscope - a seeing instrument on a submarine; telescope - a device used to see over a distance.
scrib,
script
write, written
inscribe - to write letters or words on a surface; scribe - a person who writes out documents; describe - to represent with words or pictures.
se
apart
secede - to formally break away from; seclude - to keep away from; serum - a liquid isolated out of another.
sect
cut
dissect - to cut apart piece by piece; intersection - the place or point where two things cross each other; bisect - to cut into two equal parts.
self
of, for, or by itself
self-discipline - the ability to discipline yourself; self-respect - respect for yourself; selfish concerned only with your own interests.
semi
half, partial
semiannual - every half year; semicircle - half a circle; semiconscious  - partly conscious; semiannual - every half of a year.
sept/i
seven
September - this used to be the seventh month in the Roman calendar; septet - a group of seven musicians; septuagenarian - a person in his/her seventies.
serv
save, keep
conserve - to save or keep something safe; preserve - to save something; reservation - a place kept for a person.
sex
six
sextet or sextette - a composition or group of six, sextuple - sixfold; sexagenarian - person in his/her sixties.
sol
alone
desolate - lonely, dismal, gloomy; solitary - done alone, by yourself; solo - a performance done by one person alone.
sol
sun
solar - involving the sun; parasol - umbrella protecting from the sun; solarium - a room where one is exposed to sun light.
somn/I
sleep
insomnia - inability to fall asleep; somniloquy - talking in your sleep; somnolent - feeling sleepy.
son
sound
consonant - a speech sound; sonorous - producing loud, full, rich sounds; supersonic - faster than sound; unison - as one voice.  
soph
wise
philosopher - a wise person; sophisticated - wise about the ways of the world; sophism - a clever but misleading argument.
spec/t,
spic
see, look
circumspect - cautious, looking all around; retrospective - a looking back at past things; spectator - a person who sees an event.
sphere
ball
biosphere - the whole round surface of the earth; hemisphere - half the earth spherically shaped like a ball.
spir
breathe
inspire - to stimulate or animate; transpire - to give of vapor with waste product through the skin or a membrane; spirit - invisible life force.
sta
stand
stable - standing steady and firm; stagnant - standing still, not moving; stationary - at a standstill, fixed.
stell
star
constellation - a group of stars that forms a pattern; interstellar - between the stars; stellar - relating to stars.
struct
build
construct - to build; destruction - the act of destroying something that was built; structure - something built; infrastructure - underlying framework of a system.
sub
under, lower than,
inferior to
submarine - an underwater boat; submerge - to put underwater; substandard - inferior to accepted standards.
sum
highest
sum - the combined total of everything; summation - the total, highest amount; summit the highest point or top.
super
higher in quality
or quantity
Super bowl - the final annual football game; superior - above average, better in quality; supersonic - faster than the speed of sound.
sy/m
/n/l/s
together, with, same
symmetry -similarity in size, form or arrangement; synergy - the combined effect; synchronize - to cause to occur at the same time.
tact, tang
touch
contact - a state in which two things touch; tactile - relating to the sense of touch; tangible - able to be touched; intact - with nothing missing.
tax/o
arrangement
syntax - the systematic arrangement of words; taxonomy - the science of classification; ataxia - loss of the ability to coordinate muscle action. 
techno
technique, skill
technology - the practical application of knowledge; technocracy - rule of technology; technologically - characterized by technology.
tel/e/o
far, distant, complete
telephone - a device to talk to a distant person; telescope - a device to view distant objects; television - a device to receive pictures from afar; telecommuting - working remotely, bridging the distance via virtual devices.
temp/or
time
contemporary - existing at the same time; temporal - relating to time; temporary - lasting for a limited time.
term/ina
end, limit
determine - to find something out at the end of an investigation; terminate - to end; exterminate - to destroy or get rid of completely.
terr/a/i
land, earth
extraterrestrial - existing outside the earth; terrain - ground or land; territory - an area of land.
tetra
four
tetrapod - having 4 legs; tetrarchy - government by 4 rulers; tetrose - a monosaccharide with four carbon atoms.
the/o
god
monotheism - belief in one god; polytheism - worshiping more than one god; theology - the study of religion, god, etc.
therm/o
heat
thermal - relating to heat; thermos - an insulated jar that keeps heat in; thermostat - a device that controls heat.
tort
twist
contortion - a twisted shape or position; distort - to alter the shape or condition of; retort - reply in a manner that is supposed to change the effect of something previously said. 
tox
poison
detoxification -  the process of removing poisons; toxic - poisonous; toxicology - the study of poisons; intoxicated - influenced by drugs.
tract
pull, drag
attract - to pull objects nearer; distract - to drag attention away from something; tractor - a motor vehicle that pulls things.
trans
across,beyond, through
transcontinental - across the continent; transfer - to move from one place to another; transport - to carry something across a space.
tri
three, once in every three,
third
triangle - a figure with 3 sides and 3 angles; triathlon - an athletic contest with 3 events; tricycle - a 3-wheeI vehicle with pedals.
ultra
beyond, extreme, more than
ultrahigh - extremely high; ultramodern - more modern than anything else; ultrasonic - sound waves beyond human hearing.
un
not,opposite of, lacking
unabridged - not shortened; unfair - opposite of fair; unfriendly - lacking friendliness.
uni
one, single
unicycle - a vehicle with one wheel; unilateral - decided by only one person or nation; unique - the only one of its kind; unison - as one voice.
urb
city
suburb - residential area on the edge of a city; urban - relating to a city; urbanology - the study of city life.
vac
empty
evacuate - to empty a dangerous place; vacant - empty, not occupied; vacation - a time without work.
ven/t
come
circumvent - to go around or bypass restrictions; convention - a gathering or assembly of people with a common interest; intervene -   to come between.
ver/I
truth
veracious - truthful, honest; veracity - the truth; verify - to make sure that something is true.
verb
word
verbalize - to put into words; adverb - a word relating to a verb; proverb - a short saying that expresses a well-known truth. 
vers,
vert
turn
reverse - to turn around; introvert - being turned towards the inside; version - a variation of an original; controversy - a conversation in which positions are turned against each other.
vice
acting in place of,
next in rank
vice-president - the person next in rank to the president
vid
see
evident clearly seen
vince,
vic
conquer
convince - to win someone over; invincible - not able to be conquered; victory - the conquest of an enemy.
vis, vid
see
vision - the ability to see; envision - to picture in the mind; evident - clearly visible.
viv/i
vit
live, life
revival - the act of bringing back to life; vital - pertaining to live; vivacious - high-spirited and full of life.
voc/i
voice, call
advocate - to speak in favor of; equivocate - to use misleading language that could be interpreted two different ways; vocalize - to produce with your voice.
vol/i/u
wish, will
benevolent - showing good will and kindness; volition - the act of making a choice or decision, voluntary - resulting from your own free will.
vor,
vour
eat
carnivorous - meat-eating; voracious - desiring or eating food in great quantities; devour - to eat quickly. 
xen/o
foreign
xenophobic - afraid of foreigners; xenogenesis - the creation of offspring that is completely different from either parent; xenophile - attracted to foreigners.
xer/o/I
dry
xerophyte - a plant that grows in dry climate; xerography - a dry photocopying process; xeric - requiring small amounts of moisture.
zo/o
animal life
zoology - study of animals; zooid - resembling an animal; zooplankton - minute floating aquatic animals.
zyg/o
pair
zygote - a cell formed by the union of two gametes and the organism developing from that; zygomorphic - pertaining to organisms that can be divided into symmetrical halves along one axis only.

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