The word "witlessnesses" is a noun that means the absence or lack of intelligence, cleverness, or wisdom. The antonyms for this word would be traits that are commonly associated with intelligence, such as astuteness, sagacity, shrewdness, or wisdom. Astuteness denotes the ability to perceive and analyze situations accurately and quickly, while sagacity and shrewdness both refer to sound judgment and keen insight. Wisdom, on the other hand, refers to the ability to use knowledge and experience to make good judgments and decisions. By using these antonyms, one can effectively communicate the opposite meaning of "witlessnesses" in a clear and concise manner.