Nonlexical refers to something that is not related to or derived from language. Its antonyms could be lexical, linguistic, or verbal. Lexical refers to words, vocabulary, or language, and thus, it is the opposite of nonlexical. Linguistic also pertains to language, including its study and analysis. Verbal, on the other hand, relates to spoken or written communication using words. Therefore, if something is not nonlexical, it can be described as lexical, linguistic, or verbal, all of which are related to language in some way. Knowing these antonyms can help clarify the meaning of a statement and expand one's vocabulary.