Annunciate is a verb that means to proclaim, declare or announce something. Some of the antonyms for annunciate could be to conceal, keep quiet, withhold or suppress important information. Another antonym for annunciate could be uncertainty, as opposed to clear and unequivocal communication. While annunciate implies a certain level of clarity and openness, its antonyms suggest that information may be kept under wraps or not fully disclosed. In certain contexts, choosing the right antonym for annunciate can alter the meaning of a message and strongly impact perception.