Un-smooth is a word that is used to describe something that is bumpy, ragged or rough. The antonyms for the word 'un-smooth' include smooth, refined, polished, elegant and sleek. Smooth refers to something that is pleasantly soft or even, with no roughness or bumps. Refined and polished describe objects that have been carefully crafted and finished to an extremely high standard, with no imperfections or roughness. Elegant suggests a refined level of sophistication and tastefulness, while sleek is used to describe something that is stylish, streamlined and smooth in appearance. These antonyms are commonly used to communicate the opposite of un-smooth, which is an important part of effective communication.