When it comes to the antonyms of "be chaste," there are various words that one can use to describe it. Some of the antonyms for this phrase include "be promiscuous," "be impure," "be immoral," "be lascivious," and "be salacious." These words indicate behavior that goes against the principles of purity, faithfulness, and morality. Being chaste means keeping oneself pure and avoiding any promiscuous or immoral activities, while its antonyms suggest behavior that is opposite to those principles. Therefore, it is important to understand the context in which these words are used to avoid any confusion or misunderstanding.