GRE Prefix

a

in, on, of, up, to, at

back

back

be

around, about, away, completely

by

near, secondarily, incidental

for

away, from, off, apart

fore

before, previous

mis

badly, poorly, not

off

off

out

better, greater, going away

over

over, excessively, above

un

not, no, a reversal

under

below

with

away, against

ab (a, abs)

from, off, away

ad (ac, af, ag, al, an, ap, ar, as, at)

to, toward, near, very

ambi

both

ante

before, previous

bene

well, good

bi

two, twice

circum

around

com (co, col, con, cor)

with, together, very, jointly

contra (contro, counter)

against, opposing

de

away, opposed, off, down

demi

half

dis (di, dif)

away, out, apart from, reversal of, opposite of, down

ex (e, ec, ef)

away, from, out, without, missing, former

in (ig, il, im, ir)

not opposing/in, into, within

inter

among, between

intro, intra

inwardly, to the inside, within

mal

bad, evil, wrong, ill

multi

many

non

not

ob (oc, of, op)

over, against, toward, very, upon

per

through, thoroughly, completely

post

after, later, behind, following

pre

before, earlier, in front of

pro

earlier, before, in front of, in place of, favoring, forward

re

back, backward, again

retro

back, backward

se

away, aside, away from

semi

half, partly

sub (suc, suf, sub, sum, sup, sus)

under, beneath, lower, less

super, sur

over, above, extra, to a degree greater than normal

trans, tra

across, beyond, through

ultra

beyond, excessive

uni

one

a, an

lacking, without, not

amphi

both

ana

up, against, back

anti

against, opposing, opposite

apo

from, off, separate

cata, cath

down, away, thoroughly

dia

through, across, apart

dys

ill, bad, difficult

exto, ect

outside, external

en, em

in, within, among

endo, end

within, inside

epi

on, over, outside, outer

eu

good, pleasant, true, well

hemi

half

hetero

different

hyper

above, excessive, over

hypo

under, down, lower, less

iso

equal, alike

macro

large, long

mega

great, million

mes, meso

middle, intermediate

meta, met

later, with a change in

micro

small

mono

one

ne, neo

new

olig

few

para

beside, beyond, related

peri

around, near, enclosing

poly

many

pro

earlier, before, in front of, forward

proto

first

pseudo

false

syn (sym, syl, sys)

with, together, at the same time

tele

far