The antonyms for the word "most asperous" are "smoothest" and "easiest." These words indicate the opposite of roughness, coarseness, or difficulty. When a surface or texture is smooth, it lacks irregularities, harshness or sharpness, and it feels pleasant to the touch. Similarly, when an activity, task or situation is described as easy, it implies a lack of strain, effort or complication. In contrast, "most asperous" refers to the surface, texture or edges that are rough, harsh or uneven. Therefore, the antonyms for this word can be used to describe a situation, condition or physical attribute that is dissimilar to roughness or difficulty.