Prefix

[1] a- = on, in

afoot alive aside away afloat agape astride asleep abroad aloud

[2] a- (an-) = not, without

anonymous anonym anonymity anechoic anharmonic asocial aperiodic asexual ahistorical anarchy anarchic anarchism apathy apathetic atheism atheist atheistic

[3] ab- (abs-) = away from, off

absent absentee absence absorb absorbable abstract abstraction abscond abduct abductor absolve absolution abuse abusage abusive abstain abstention

[4] ad- (ac-, af-, etc.) = to, at

adapt adaptation adaptive adequate adit adorn adornment adult adulthood addict addiction addictive adhere adherence adherent adjacent admire admiration admirable advocate abbreviate abbreviation affect aggress aggression aggressive alleviate alleviation alleviative annex annexation annexment appear appearance apparent arrive arrival assist assistant attend attention attentive acclaim acclamation acknowledge acknowledgement acquire acquirement acquisition acquisitive

[5] ante- = before, in front of

antecedent antecedence antebellum antediluvian antemeridian antedate anteroom