The antonyms for the phrase "are fitting" would be "are unsuitable," "are inappropriate," "are discordant," or "are misguided." These contrasting terms imply that the subject in question does not align with the necessary criteria or standards. For instance, if we say that a particular dress is fitting for a formal occasion, the antonym for this statement would mean that the dress is not appropriate for such an event. In a broader sense, the antonyms signal a disconnection between two or more elements, emphasizing their lack of harmony or compatibility. Thus, antonyms serve as a useful tool for labeling and describing different qualities, intentions, or states.