The word "most specifying" implies something that sets apart or distinguishes it from others. The antonyms for this term could be "least specifying" or "unspecific." If something is least specifying, it is not discerning or particular, and lacks clear definition or characteristics. On the other hand, if something is unspecific, it is vague, ambiguous, or general, and does not clearly specify or define anything in particular. These antonyms highlight the importance of being clear and definitive in language, as it helps to avoid confusion and misunderstanding in communication.