When something is "not described," it means that there is no detailed explanation or portrayal of it. This phrase can be substituted with synonyms such as "unspecified," "undetailed," "unspecified," "unmentioned," "unidentified," and "nameless." When describing something that has not yet been detailed or explained, you can use phrases like "not specified," "not accounted for," "not outlined," or "not portrayed." When discussing things that have yet to be identified, you can use synonyms like "anonymous," "faceless," "unknown," "unnamed," or "unrecognized." In essence, there are many different ways to describe something that has not been explicitly stated, but these synonyms can offer more specific nuances of meaning.