Before

antedate, antemeridiem

Against

antibody, antithesis

Two

bimonthly, bipolar

Around

circumnavigate, circumlocution

Com

Together

combination, commensurate

Con

Together

contract, conjunction

De

Down

despicable, demolish

Away

dispute, dissuade

Equi

Equal

equilateral, equivocate

Extra

Beyond

extraterrestrial, extramural

Between

interdepartmental, interstellar

Within

intravenous, intracranial

Intro

Into

introspective, intromission

Bad

malevolent, malapropism

Bad

misfit, mistake

Non

Not

nonstop, nonprofit

After

postgraduate, postscript

Before

preposition, premature

Half

semicircle, semiweekly

Under

subtract, subordinate

Over

supervise, supernatural

Together

synthetic, syntax

Together

sympathy, symbiosis

Three

tricycle, triceps

Not

unfit, unequal