The term "most ill-famed" refers to something that is widely known for being notorious or infamous. To find antonyms for such a word, one should look for terms that describe something positively. Synonyms of "most ill-famed" would include words such as infamous, notorious, or disreputable. Antonyms for such words would be terms such as celebrated, illustrious, reputable, respected, or admired. These words describe something that is well-regarded or widely respected. Some examples of phrases that could replace the term "most ill-famed" would be "most respected", "most admirable", or "most renowned". These phrases convey a sense of positivity and respect toward whatever it is they describe.