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