Unartful is a word that expresses a lack of skill or grace, which is the opposite of artful. Antonyms for unartful would therefore be words that convey the concept of proficiency, finesse, and beauty. Some possible antonyms for unartful include skilled, graceful, polished, competent, polished, adept, dexterous, accomplished, adept, refined, elegant, and masterful. These words suggest a sense of mastery, talent, and creativity that is absent from the notion of unartful. By using these antonyms, one can provide a more nuanced and descriptive language that captures the complex nature of skill and beauty expressed in art.