The term "unvirtuous" is often used to describe someone who is lacking moral or ethical principles. Antonyms for this word include "virtuous," "ethical," "moral," "righteous," and "upright." These terms imply that the person in question possesses positive character traits, such as honesty, loyalty, kindness, and fairness. Alternatively, antonyms for "unvirtuous" can also include "wicked," "immoral," "corrupt," "dishonest," "vicious," "sinful," "depraved," and "evil." These words all suggest that the individual has engaged in immoral or unethical behavior and lacks positive character traits. By using antonyms of "unvirtuous," one can better describe people who possess either positive or negative personality traits.