Vocabulary Prefixes

a-, an-
without, notamorphous
ab-, abs
away, from, apartabsent
ad-, ac-, af-
to, towardadvent, advance
aero-
airaeroplane, aeronaut
amb-, ambi-
both, aroundambiguous
amphi-
both, aroundamphitheater
ante-
beforeantenatal
anti-
againstantidote, antitoxic
apo-
away fromapostasy
arch-
chief, most importantarchbishop, archcriminal
auto-
selfautomatic, autocrat
be-
about, makebelittle, beguile, beset
bene-
well, goodbenediction
bi-
twobiennial, bicycle
by-, bye-
added tobyways, by-laws
cata-
downcatalogue, cataract
centi-, cente-
hundredcentigrade, centenary
circum-
aroundcircumference, circumambient
co-, col-, com-, cor-
togethercompanion
contra-
against, countercontradict, contraceptive
de-
downdenude, decentralize
deca-, deci
tendecade, decagon
demi-
halfdemigod
dia-
through, betweendiameter
dis-
not, opposite todislike, disagree
duo-
twoduologue, duplex
dys-
ill, harddysentary
e-, ex-
out ofexhale, excavate
ec-
out ofeccentric
en-, in-, em-, im-
into, notenrage, inability, embolden, emulate, impress
equi-
equallyequidistant
epi-
upon, at, in additionepidemic, epidermis
extra-
outside, beyondextra-essential
for-, fore-
beforeforesee
hemi-
halfhemisphere
hepta-
sevenheptagon
hexa-
sixhexagon, hexateush
homo-
samehomonym
homo-
samehomonym
hyper-
above, excessivehypercritical, hypertrophy
il-
notillegal, illogical
in-, im-, un-
notimperfect, inaccessible
inter-
among, betweeninterrupt, intermarriage
intra-, intro-
among, betweenintramural, introvert
iso-
equal, sameisobaric, isosceles
mal-
bad, wrongmalfunction, malformed
meta-
after, beyondmetabolism, metaphysical
mis-
wronglymifit, mislead
mono-
one, singlemototonous, monocular
multi-
manymultipurpose, multimillion
non-
notnonsense, nonpareil
ob-, oc-, of-, op-
in the way of, resistanceobstruct, obstacle, oppose
octa-, octo-
eightoctahedron, octave
off-
away, apartoffset
out-
beyondoutnumber, outstanding
over-
aboveoverhear, overcharge
para-
aside, beyondparable, paradox
penta-
fivepentagon, pentateuch
per-
throughperennial, peradventure
peri-
around, aboutperimeter, pericardium
poly-
manypolygamy, polytechnic
post-
afterpostscript, postnatal
pre-
beforeprehistoric, prewar
prime-, primo-
first, importantprimary, prime minister
pro-
in front of, favoringprologue, pro-British
quandri-
fourquandrennial, quadrangle
re-
again, backreappear, recivilize
retro-
backwardretrograde, retrospect
se-
asidesecede
self-
personalizingself-control, self-taught
semi-
halfsemicircle, semidetached
sub-
undersubmarine, subterranean
super-
above, oversuperfluous, superior
syl-
with, togethersyllogism
syn-, sym-
togethersympathy, synchronize
tele-
far, at or to a distancetelegram, telepathy
ter-
three timestercentenary
tetra-
fourtetrahedron, tetralogy
trans-
across, throughtransatlantic, translate
tri-
threetriangle, triparite
ultra-
beyondultramarine, ultraviolet
un- (im)
notunbroken, unbutton, unable
under-
belowunderfed, underling
uni-
oneunicellular, uniform
vice-
in place ofviceroy, vice-president
yester-
preceding timeyesterday, yesteryear