Fundamentals: Common Prefixes and Their Meanings

anti-

against, opposed to

auto-

self

de-

reverse, remove, away from

dis-

not, opposite of

en-/em-

cause to, put into

fore-

before

in-/im-/il-/ir-

not, without

inter-

between, among

mid-

middle

mis-

wrongly, badly

non-

not, without

over-

above, too much

pre-

before

re-

again, back

un-

not