PREFIX

PREFIX MEANING EXAMPLES
anti-
against or opposite to
anticlockwise, antibiotic
auto-
self
autobiography, automat
dis-
not, or away
dissimilar, disconnect
in-
not
insane, inhuman
il-
not
illogical, illegal
im-
not
immature, improbable
ir-
not
irrelevant, irregular
inter-
between
international, intermarry
mis-
wrong
misunderstand, misspell
post-
after
postnatal, postscript
pre-
before
prenatal, prehistoric
pro-
for, or forward
propose, pro-British
re-
again, or back
rewrite, reconsider
sub-
under
submarine, substandard
super-
above
supervisor, superhuman
trans-
across
transport, transplant
un-
not, or in reverse
unfinished, unarmed