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
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