The word un-chaste refers to someone or something that is not pure, modest, or virtuous. The antonyms for un-chaste are words that describe individuals or things that are morally upright, decent, and pure. Some examples of antonyms for un-chaste include chaste, modest, pure, virtuous, abstinent, honorable, decent, honest, and ethical. These words describe individuals who conform to social norms and ethical principles and behave in a manner that is appropriate and righteous. Antonyms for un-chaste can also include words like unblemished, innocent, virgin, and pure-hearted, which relate to the notion of being pure and untouched.