Prefix Meaning Example un- not, the opposite of unhappy re- again, back respect non- not, without fiction

dis- opposite of, not disagree
mis- wrong, badly misunderstand
pre- before preview
post- after postgame
anti- against, opposite of anti-social
de- opposite of, remove deactivate

Prefix Meaning Example

sub- below, less than subway
ex- former, out of ex-wife
de- remove, away from defrost