Medical Prefixes and Their Meanings

Front

a-/an-

Back

without

Front

ab-

Back

away from

Front

ad-

Back

toward

Front

ante-

Back

before

Front

anti-

Back

against

Front

auto-

Back

self

Front

bi-

Back

two

Front

brady-

Back

slow

Front

circum-

Back

around

Front

con-

Back

with/together