In ASVAB For Dummies, I coach you through common prefixes so you can figure out what unfamiliar words mean. The strategy of using prefixes (along with word roots and suffixes) works really well for everyone – even if English isn’t your first language, you can pick apart words and use their prefixes to help you define them.

Super-Common Prefixes That Can Help You Figure Out What Words Mean

Check out these common prefixes, words you’ll see them in, and their meanings.

Prefix Examples Meaning
a- or an- agnostic, atheist, atypical not or without
ad- adjacent, advocate near or toward
ambi- or amphi- ambidextrous, amphitheater both or on both sides
anti- antibiotic, antifreeze, ANTIFA against
bi- bipartisan, bilingual, bisexual two
cent- or centi- centimeter, centennial hundred or hundredth
de- defrost, debone, devalue away from, down, reversal or off
deca- decade, decathlon ten
dis- disagree, disappear opposite of
e- or ex- exclude, evade out of or from
hex- or sex- hexagon, sextet six
in- or im- inadequate, immoral not or without
mal- malicious, malfunction wrong or bad
mis- misinformed, misunderstand, mistake wrongly
mono- monologue, monopoly one
nov-, neo- or nou- novelty, neonatal new
oct- octagon, octane, octopus eight
omni- omnipotent, omnivore all
para- parallel, paranoid beside
poly- polygamous, polygon many
post- posterior, post-mortem after
pre- precooked, prefix, premonition before or in front
pro- proceed, proclaim to go forth or put forth
quad-, quar- or quat- quart, quadrant four
quin- quintuplets, quintet five
se- segregate, separate away or apart
sept- septuplet, septet seven
sub- submarine, subtitle, subpar under
super- or sur- supersede, surpass above or over
sym- or syn- symmetry, synonym the same
trans- transaction, transit across or beyond

Are You Studying for the ASVAB?

If you’re studying prefixes because you’re trying to score your best on the Word Knowledge subtest of the ASVAB, you’ll be glad to know that the book is full of great information that can help you get your best score.

Get ASVAB For Dummies Here