PREFIX

MEANING

EXAMPLE

bene-, beni-

well, good

benevolent, benign

co-

with, together

cooperate, coincide

com-, con-, col-, cor-

with, together

combat, confess, collaborate

dys-

bad

dysfunction, dyslogistic

eu-

good

euphoria, eugenic

mal-

bad, ill, wrong

maltreat, malnutrition

mis-

wrong

misunderstanding, mistake

pseudo-

false

pseudoscience, pseudonym

sym-, syn

together

sympathy, synchronize

PREFIX

MEANING

EXAMPLE

anti-

against, opposite

antiwar, antipathy

counter-

against, opposite

counteract, counterattack

pro-

for, forward

pro-American, pro-communist

re-

against, opposite

revolt, resist

PREFIX

MEANING

EXAMPLE

extra-

excessive

extravagant, extracurricular

over-

excess, too much

overstate, overload

super-

superior, over

superman, supermarket

under-

not enough

underestimate, underripe

PREFIX

MEANING

EXAMPLE

ante-

before

antedate, antecede

ex-

former

ex-president, ex-serviceman

post-

after-

postgraduate, postpone

pre-

before

prepare, predict

re-

again, back

review, reactivate

retro-

backward

retrogress, retrospect

PREFIX

MEANING

EXAMPLE

ab-, a-

away from

abnormal, amoral

ad-, ac-, af-, ag-, an-, as-

to, toward

admit, accept, affirm, aggress, annotate, assure

back-

back-

backbone, background