Gre Vocabulary Prefixes

Front 1

a
also: an

Back 1

not, without
(atheist, anaemic)

Front 2

a

Back 2

to, towards
(aside, aback)

in the process of, in a particular state
(a-hunting, a-glow)

Front 3

a

Back 3

of
(anew)

completely
(abashed)

Front 4

ab
also: abs

Back 4

away, from
(abdicate, abstract)

Front 5

ad
also: a, ac, af, ag, al, an, ap, at, as

Back 5

movement to, change into, addition or increase
(advance, adulterate, ascend, affiliate, aggravate, alleviate, annotate, apprehend, assemble, attend)

Front 6

ante

Back 6

before, preceeding
(antecedent, antebellum)

Front 7

anti
also: ant

Back 7

opposing, against, the opposite
(antibiotic, anticlimax, Antarctic)

Front 8

be

Back 8

all over, all around
(bespatter, beset)

completely
(bewitch, bemuse)

having, covered with
(bejewelled)

affect with- added to nouns
(befog)

cause to be- added to adjectives
(becalm)

Front 9

com
also: co, col, con, cor

Back 9

with, jointly, completely
(combat, codriver, collude, confide, corrode)

Front 10

contra

Back 10

against, opposite
(contraceptive)

Front 11

counter

Back 11

opposistion, opposite direction
(counter-attack, counteract)

Front 12

de

Back 12

down, away
(descend, despair, depend)

completely
(denude, denigrate)

removal, reversal
(de-ice, decamp)

Front 13

dia
also: di

Back 13

through, across
(diagonal)

Front 14

dis
also: di

Back 14

negation, removal, expulsion
(disadvantage, dismount, disbud, disbar)

Front 15

en
also: em

Back 15

put into or on
(engulf, enmesh)

bring into the condition of
(enlighten, embitter)

intensification
(entangle, enrage)

Front 16

ex
also: e, ef

Back 16

out
(exit, exclude, expand)

upward
(exalt, extol)

completely
(excruciate, exasperate)

previous
(ex-wife)

Front 17

extra

Back 17

outside, beyond
(extracurricular)

Front 18

hemi

Back 18

half
(hemisphere)

Front 19

hyper

Back 19

beyond, more than, more than normal
(hypersonic, hyperactive)

Front 20

hypo

Back 20

under
(hypodermic, hypothermia)

Front 21

in
also: il, im, ir

Back 21

not, without
(infertile, inappropriate, impossible)

in, into, towards, inside
(influence, influx, imbibe)

Front 22

infra

Back 22

below
(infrared, infrastructure)

Front 23

inter

Back 23

between, among
(interact, interchange)

Front 24

intra

Back 24

inside, within
(intramural, intravenous)

Front 25

non

Back 25

absence, negation
(non-smoker, non-alcoholic)

Front 26

ob
also: oc, of, op

Back 26

blocking, against, concealing
(obstruct, occult, offend, oppose)

Front 27

out

Back 27

surpassing, exceeding
(outperform)

external, away from
(outbuilding, outboard)

Front 28

over

Back 28

excessively, completely
(overconfident, overburdened, overjoyed)

Front 29

peri

Back 29

round, about
(perimeter)

Front 30

post

Back 30

after in time or order
(postpone)

Front 31

pre

Back 31

before in time, place, order or importance
(pre-adolescent, prelude, precondition)

Front 32

pro

Back 32

favoring, in support of
(pro-African)

acting for
(procounsel)

motion forwards or away
(propulsion)

before in time, place, or order
(prologue)

Front 33

re

Back 33

again
(repaint, reappraise, reawake)

Front 34

semi

Back 34

half, partly
(semicircle, semi-conscious)

Front 35

sub
also: suc, suf, sug, sup, sur, sus

Back 35

at a lower position
(submarine, subsoil)

lower in rank
(subordinate)

nearly, approximately
(sub-tropical)

Front 36

syn
also: sym

Back 36

in union, acting together
(synchronize, symmetry)

Front 37

trans

Back 37

across, beyond
(transnational, transatlantic)

into a different state
(translate)

Front 38

ultra

Back 38

beyond
(ultraviolet, ultrasonic)

extreme
(ultramicroscopic)

Front 39

un

Back 39

not
(unacceptable, unreal, unhappy)

reversal or cancellation of action or state
(unplug, unmask)

Front 40

under

Back 40

beneath, below
(underarm, undercarriage)

lower in rank
(undersecetary)

not enough
(underdeveloped)