Prefixes

Prefixes, their meaning and examples. Please Note: Where the word is supposed to be, that is where the definition of the prefix is. Where the definition is, that is where the prefix and the example of the prefix to a word is located.
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from, away from
ab-
Example: abnormal, abduct, absent, abhor
against; opposite; reverse
anti-
Example: antiaircraft, antifreeze, antibiotics
self
auto-
Example: automatic, autograph, autobiography
good
bene-
Example: benediction, benefactor, benevolent
two
bi-
Example: bifacial, bifocal, biennial
around
circum-
Example: circumnavigate, circumference
together
co-, con-, com-
Example: coauthor, cooperate, confront, confound, combine
against
contra-
Example: contradict, contradistinguish, contrary
opposite of; away from; undo
de-
Example: deactivate, deform, degrade, deplete, descend
opposite
dis-
Example: disagree, disarm, discontinue, dishonest
out; beyond; away from; former
ex-
Example: excel, exclude, exhale, exile
outside; beyond; besides
extra-
Example: extraordinary, extracurricular
before
fore-
Example: forecast, foreword, forestall, forethought
more than normal; too much
hyper-
Example: hyperactive, hypercritical, hypertension
not
il-
Example: illegal, illegible, illiterate, illlogical
not
im-
Example: imbalance, immature, immobilize
not, go into
in-
Example: inaccurate, inactive, inhabit
among, between
inter-
Example: interaction, intercede, interchange
within
intra-
Example: intramural, intrastate, intravenous
not
ir-
Example: irredeemable, irregular, irresponsible
wrong, bad
mal-
Example: maladjusted, malfunction, malice
wrong; bad; no; not
mis-
Example: misfire, misbehave, misconduct
not; opposite of
non-
Example: noncommittal, nonconductor, nonpartisan
after
post-
Example: postglacial, postgraduate, posterior
before
pre-
Example: preamble, prearrange, precaution
before; for; in support of
pro-
Example: prognosis, program, prologue, prophet
back; again
re-
Example: recall, recede, reflect, repay
of the self
self-
Example: self-taught, self-worth, self-respect, selfish
under; beneath
sub-
Example: subcontract, subject, submarine, submerge
over
super-
Example: superabound, superabundant, superhuman
across; over
trans-
Example: transatlantic, transcend, transcribe, transfer
extremely
ultra-
Example: ultraliberal, ultramodern, ultrasonic
not
un-
Example: unable, uncomfortable, uncertain, unhappy
life
bio-
biology, biosphere
hundred
cent
century, centurion
ten
deca
decade, decagon
earth
eco
ecology, ecosystem
equal
equi
equilateral, equilibrium
half
hemi, semi
hemisphere, semiprivate
great, large
magni, mega
magnify, magnificent, megaphone
small
micro, mini
microscope, miniskirt
one
mono, uni
monorail, unicycle
many
multi
multiply
five
penta, quint
pentagon, quintuplets
four
quad
quadrilateral
far
tele
telephone, telescope
three
tri
triplets, triangle