The word "unsmoothest" refers to something that is not smooth or rough in texture. Its antonyms are words that describe something that is smooth, even, or flat. Examples of antonyms for "unsmoothest" are "smoothest," "flattest," "evenest," and "softest." These words can be used to describe surfaces, fabrics, or even people's skin. Opposite words also include "polished," "sleek," and "refined," which signify that something or someone is well-groomed, shiny, and glossy in texture. By using antonyms, we can better distinguish the different qualities and characteristics of objects, and more accurately describe them to others.