anti- (antibiotic, antisocial)
e-, ex- (eclipse, expelled)
in-, il-, im- (invite, illuminate, import)
pro- (proceed, proclaim)
ab- (absent, abduction)
en-, em- (enroll, embrace)
in-, il, im- ir- (invisible, illegal, impossible, irregular)
a- (ashore, afire)
un- (undo, unaltered, unspoken)
a-, an- (abyss, achromatic, asymptomatic)
contra- (contraband, contradict)
fore- (forebear, foreword)
re- (recall, redo, repeat)
de- (debunk, deprive, declaw)
post- (postnatal, posterior)
over- (overactive, overcast, overprotective)
super- (superficial, superiority)
semi- (semicircle, semimonthly)
dis- (discourage, disloyal, dissect)
pre- (prediction, prepare, pretest)