该词的反义词是immoral。

(1)(of people and their behavior人及其行为)not considered to be good or honest by most people不道德的,邪恶的

例如:It's immortal to steal.

偷盗是不道德的。

(2)not following accepted standards of sexual behavior放荡的,淫荡的

例如:an immoral act/life/person

淫荡的举动/生活/人