The word "un-cultured" implies a lack of refinement, sophistication, or knowledge about culture. Antonyms for "un-cultured" would suggest someone who is well-educated, knowledgeable, and refined. One possible antonym could be "cultured," which denotes a person who is conversant with the fine arts, literature, or music. Another antonym for "un-cultured" would be "cultivated," which emphasizes someone who has developed manners or taste through learning, experience, or exposure to different cultures. Alternatively, "civilized" and "polished" would also make good antonyms, as they indicate a person who is well-cultured and refined in their behavior, manners, and speech.