The word "un-wrinkled" refers to something that is smooth and without wrinkles. The antonyms for "un-wrinkled" are many, and some of them are "wrinkled," "crumpled," "creased," "lined," and "rumpled." These words denote something that is no longer smooth and has got folds, furrows or pleats. The antonyms are used to describe things that lack the smoothness of un-wrinkled objects, such as clothes, paper, and skin. While "un-wrinkled" implies a sense of youthfulness and immaculate appearance, its antonyms denote age or roughness. These antonyms can help to fully articulate the texture and appearance of items and provide a vivid picture for the reader or listener.