Words that mean the opposite when using the prefix in/im or ex.

in- or im-

in

intra- or intro-

inwardly

ex-

out

extrasensory

outside the normal senses

extra- or extro-

outwardly, beyond

extrovert

a lively person interested in others, a person whose interests are mainly directed outside of self

exterior

being on the outer side, external

interior

being within, internal

extraordinary

beyond what is ordinary or normal

explicit

clearly stated

extravagant

going beyond the bounds of reason, very elaborate

introvert

someone concerned with their own thoughts or feelings, to turn inwards

implicit

suggested rather than actually stated

inhale

to breathe in

exhale

to breathe out

implode

to burst inwards

explode

to burst outwards

extrapolate

to guess (what is not known) from that which is known

inhibit

to hinder, to prohibit or forbid an action

exhibit

to show, to place on public show

intrastate

within a state