Being apposite is a valuable quality to possess, but there are times when its opposite is more fitting. One antonym for apposite is inappropriate, which means unsuitable or not fitting for a particular situation. Another antonym is irrelevant, which refers to something that is not applicable or conducive to the matter at hand. Conversely, appropriate means fitting, suitable, or relevant to the situation. It is important to consider the context when determining whether a word is apposite or not. Choosing the appropriate antonym can help to convey the intended meaning and avoid confusion in communication.