The word "proscribe" is often used in a legal context to indicate an official directive banning or prohibiting a particular activity or practice. Some possible antonyms for "proscribe" include "permit," "authorize," "encourage," "promote," and "endorse." These words suggest a positive or permissive attitude towards a particular activity or idea, rather than the negative or restrictive stance implied by "proscribe." Other antonyms might include "allow," "sanction," "tolerate," "support," and "advocate." By using these words, speakers or writers can convey a different tone and meaning than the one they would create with "proscribe.