Prefix Meaning Example
anti- against antifreeze
de- opposite defrost
dis-* not, opposite of disagree
en-, em- cause to encode, embrace
fore- before forecast
in-, im- in infield
in-, im-, il-, ir-* not injustice, impossible
inter- between interact
mid- middle midway
mis- wrongly misfire
non- not nonsense
over- over overlook
pre- before prefix
re-* again return
semi- half semicircle
sub- under submarine
super- above superstar

un-* not unfriendly
under- under undersea