The term "most unwrinkled" implies a smooth and effortless surface. However, there are many words that are antonyms of this term. Words like "wrinkled," "creased," "crumpled," "crinkled," and "rumpled" all serve as antonyms. These words suggest a texture that is not smooth, but rather bumpy and uneven. Additionally, "folds," "puckers," and "ridges" also serve as antonyms to "most unwrinkled". These words describe the visible lines and contours that are present on a surface that is not smooth. In summary, there are many words that serve as antonyms to "most unwrinkled," all of which suggest a surface that is not smooth and effortless.