Being fitting means being appropriate or suitable for a particular situation or purpose. Its antonyms can vary from contexts to contexts. In the context of fashion, the antonyms for being fitting can be ill-fitting, baggy, or oversized. In the context of behavior, the antonyms can be inappropriate, unsuitable, or improper. In the context of language, the antonyms can be inapplicable, irrelevant, or unsuited. It's essential to consider the context before figuring out the antonyms for the word "being fitting." Using the incorrect antonyms may lead to confusion or misunderstanding. Therefore, it's important to verify the usage and context before applying its antonyms.