Un-befitting is a word that describes something that is not suitable or appropriate. Its antonyms, on the other hand, refer to things that are fitting, suitable, or appropriate. Some common antonyms for "un-befitting" include fitting, appropriate, becoming, right, proper, and suitable. These words suggest that the thing in question conforms to accepted standards or norms, and is therefore considered to be appropriate or fitting. Other antonyms for "un-befitting" include decorous, genteel, and seemly, all of which imply a sense of elegance, refinement, and good taste. Overall, antonyms for un-befitting suggest that something is in harmony with the expected norms, values, and conventions of a particular situation or context.