decriminalize (verb) – to make legal something that was once illegal
BREAKDOWN: DE- (from) + CRIM- (legal offense) + -AL (pertaining to) + -IZE (to make)
— to criminalize is to make something illegal
This word is built on the root CRIM-, which means judgment, accusation, or legal offense.
Common CRIM- words include crime and criminal.
More esoteric CRIM- words include recriminatory.