legalize
verb
a campaign to legalize marijuana:
make legal, decriminalize, legitimize, legitimatize, legitimate, validate, ratify, permit, allow, admit, accept, authorize, sanction, warrant, license, approve, countenance, pronounce lawful, give the stamp of approval to;
regularize, regulate, normalize;
informal OK, give the go-ahead to, give the thumbs up to, give the OK to, give the green light to, say the word, give one's blessing to.
▷antonyms prohibit.