The antonyms for the word "most rustical" are refined, cultured, cosmopolitan, sophisticated, and polished. While "most rustical" implies a lack of sophistication or refinement, the antonyms suggest an urbane, worldly, and polished demeanor. A refined person is someone who has manners, poise, and grace, while a cultured person is well-versed in the arts and humanities. A cosmopolitan person has a broad knowledge of different cultures and lifestyles, while a sophisticated person exudes elegance and class. A polished person is someone who is well put together and has a perfect appearance. By using these antonyms, one can convey a completely different image compared to that of the "most rustical.