The phrase "not legal" is often used to describe actions or situations that are prohibited by law. However, there are many synonyms for this phrase, which can be used to add greater nuance to this concept. Some alternative phrases include "unlawful," "illicit," "prohibited," "forbidden," "unauthorized," "illegal," and "against the law." These phrases can be used in different contexts to describe various types of actions that are restricted or banned. By using these synonyms, as well as other related terms, writers and speakers can convey a clearer and more specific meaning when discussing legal or ethical issues.