35 Most Useful Prefixes for SAT Prep Vocabulary

a- or an-

without, lack of

ante

before, in front of

anti-

against, opposite

auto-

self, own

ambi-

both, not sure

bene-

good

bi- or di-

two

co- or com-

with, together

con- or contra-

against

circum-

around, about

corp-

body

de-

down, away from

dict-

speak, say

dis-

apart, away from, not

dys-

bad, difficult, abnormal

eu-

good, pleasant

ex-

out, away from, outside

extra- or extro-

beyond, outside

homo-

same, alike

hetero-

different, other, unlike

hyper-

above, over, excessive

hypo-

below, under, deficient

in- or im-

in, on, or not

inter-

between, among

mal-

bad, evil

micro-

small

macro-

large

mis-

wrong; incorrect

multi- or poly-

many, much

neo-

new, recent

pre-

before, in front of

pro-

for

re-

back, again

retro-

backward, behind

un-

not, opposite of