The term "art lenient" typically refers to being forgiving or flexible when it comes to artistic expressions. Conversely, some antonyms for "art lenient" are "art strict" or "art rigid." These words portray the idea of being inflexible or uncompromising when it comes to creative expressions like music, literature, or visual arts. Another antonym for "art lenient" is "art conservative," which typically implies values of traditionalism or sticking to well-established rules and conventions. Other opposite terms might include "art intolerant" or "art severe," which convey the severity or harshness of disapproval towards artistic expressions that stray from established norms.