What does "illicit" most nearly mean?

The term "illicit" refers to something that is not permitted by law, regulations, or societal norms. Therefore, "unlawful" is the most accurate synonym, as it directly conveys the idea of something being forbidden or illegal. This term is often used in contexts involving activities that violate legal statutes or ethical standards. Understanding the nuances of the word helps clarify that it goes beyond mere permission, capturing the essence of actions that are explicitly against the law. This contrasts with the other choices, which imply legality and acceptance within societal or legal frameworks.