Prefix review

a-

without (one letter)

anti-

against

brady-

slow

de-

without(two letters)

echo-

a repeated soundf

endo-

inner or within

hyper-

excessive

hypo-

Insufficient or below

inter-

between

intra-

within

per-

through

peri-

many

tachy-

fast

trans-

across

ultra-

beyond

auto-

self

dys-

abnormal difficult or painful

pan-

all

eu-

normal

ex-

outward

in-

inward or not

epi-

above

pachy-

thick

sub-

under

para-

beside, two like parts of a pair

poly-

many

extra-

outside of

retro-

backward or behind