What are prefixes?

What are prefixes? Prefixes are added at the start of a word to change its meaning. If you understand what the common prefixes mean, it can help you understand new words. Let's take a look at the prefix meaning and sample sentence. 

YOU CAN FIND PREFIXES IN THE DICTIONARY

YOU CAN FIND PREFIXES IN THE DICTIONARY

un = reverse, cancel, not --->  undo -  unable - unwanted
dis = not - ---> dislike - disagree - dishonest
im /in/ ir = not  ---> impossible - incorrect - irresponible
non = not ---> nonfat - nonliving - nonprofit
re = again ---> redo - rewrite - rebuild
mis = wrongly  ---> misbehave - misspell - mishear
anti = against  ---> antisocial - antibacterial
co = together  ---> co-writer - co-ownership - cofounder
ex = former ---> ex-wife - ex-president
inter = between, among, ---> international - interfere
mid = middle - midcourse - midafternoon - midday
out = better than others --->  - outnumber - outsmart - outswim
over = too much  ---> overestimate - overload - overacieve
pre - before ---> prepay - preschool
post = after  --->  postgraduate - postwar
self = oneself ---> self-confidence - self-esteem
sub = under  ---> subordinate - subtitle
super/sur = above, over  ---> superhuman - surcharge
under = beneath, below  ---> underachieve - undergrowth