a

not

aseptic, asymmetrical

mid

half

midway, middle

ab

away from

abnormal, absent

mini

 very small

miniskirt

anti

against

antibiotic, antifreeze

mis

wrong

misspell, misunderstand

auto

self, alone

automatic, automobile

mono

one, single

monotheistic, monologue

bene

good

beneficial, benefit

multi

many

multinational

bi

two, double

bicycle, bicentennial

non

not

nonconformist, nonentity

bio

life

biology, biosphere

over

too much

overrun

cent

hundred

century, centurion

pan

all

pan-American

centi

hundredth

centimeter

para

beside, guard

parallel, parachute

circum

around

circumference

penta

five

pentagon

co

with, together

cooperate

per

throughout

perfect, pervade

com

with

compassion, combine

poly

many

polygon

con

with

connect

port

carry

portage

contra

against

contradict

post

after

postpone, postgraduate

deci

tenth

decimeter

pre

before

prepare, predict

deca

ten

decagon

pro

forward, supporting

progress, propel, profess

dia

through

diagonal, diameter

quad

four

quadrilateral

dis

apart

dislocate, dismantle

re

again, back

reconsider

eco

earth

ecology, ecosystem

semi

half, partly   

semidetached semiprivate

equi

equal

equilateral, equilibrium

sub

below, under

submarine, submerge

ex

former

ex-wife, ex-president

super

above

superman, supernatural

hemi

half

hemisphere

tele

far

telephone, television

hyper

above, over

hyperactive

trans

across, over

transport, transplant

il/im

not

incorrect, irresistible

tri

three

triangle, tricycle

in/ir

not

incorrect, irresistible

ultra

beyond

ultrasound, ultra light

inter

between, among

interstate, international

un

not, uncertain

uneducated, unbearable

magni

great, large

magnify, magnificent

under

below

underused

mega

great

mega city, megaphone

uni

one

universal, unicycle

micro

small

microscope