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extra-

outside, beyond

extracurricular

hemi-

half

hemisphere

hyper-

beyond, more than, more than normal

hypersonic, hyperactive

hypo-

under

hypodermic, hypothermia

in-

also il-, im-

not, without

infertile, inappropriate, impossible

also il-, im-, ir-

in, into, towards, inside

influence, influx, imbibe

infra-

below

infrared, infrastructure

inter-

between, among

interact, interchange

intra-

inside, within

intramural, intravenous

non-

absence, negation

non-smoker, non-alcoholic

ob-

also oc-, of-, op-

blocking, against, concealing

obstruct, occult, offend, oppose

out-

surpassing, exceeding

outperform

external, away from

outbuilding, outboard

over-

exces

sively, completely

overconfident, overburdened, overjoyed

upper, outer, over, above