The antonyms for the word "most roughened" are smooth, polished, refined, gentle, and soft. The word "smooth" implies a lack of roughness or irregularities on a surface, while "polished" suggests a high level of shine and smoothness due to careful polishing. "Refined" refers to something that is sophisticated, elegant, and polished, while "gentle" implies a soft, calm, and delicate touch. Finally, "soft" indicates something that is not rough or hard but smooth and pliable to the touch. These antonyms can be used to describe different textures, surfaces, or objects that possess qualities opposite to those of the word "most roughened.