The antonyms for the word "be fits" can be summarized as follows. First, the word can be negated by using the prefix "mis" to create the word "misfits," which means an improper or unsuitable person or thing. Second, the word can be opposed by using the antonym "ill-suited," which means not well adapted or suitable. Third, the opposite of "be fits" can be expressed by using the terms "disadvantageous" or "unsatisfactory," which mean unfavorable or undesirable. Fourth, "be fits" can be replaced by the term "mismatched," which denotes a lack of harmony or compatibility. In essence, the antonyms for "be fits" imply a lack of suitability, harmony, or compatibility.