Official is a word that usually refers to something that is authorized or recognized. Its antonyms, on the other hand, represent the opposite meaning, which is without authorization or recognition. The common antonyms for the word "un-official" are "official," "formal," "recognized," or "legitimate." These words can be used to describe a situation or action that is permitted, authorized, or approved by an authority or group. In contrast, "unofficial" denotes a situation that is not authorized, recognized, or approved of. Antonyms provide an excellent way of clarifying the meaning of a word and can be useful in many different contexts, including writing, speech, and communication.