The term "proscribe" refers to the act of prohibiting or outlawing a particular practice or behavior. Antonyms for this word include approve, endorse, allow, permit, and authorize. If something is approved or endorsed, it means that it is accepted and approved of, while if it is allowed or permitted, it means that it is not forbidden. Authorizing something implies that permission has been given for a particular activity or practice to take place, while proscribing it would mean the opposite. Therefore, antonyms for "proscribe" describe actions that are legal, acceptable, and approved of by society or authority.