Antonyms for the word "overtness" are quite varied, as they may depend on the context in which the term is used. In general, the word "overtness" refers to the quality of being visible, obvious, or upfront. Its antonyms, therefore, could include words such as "hiddenness," "obscurity," "secrecy," "cunningness," "deceit," or "disguise." These words describe qualities that are opposite to those of overtness, and they indicate a tendency to conceal, deceive, or veil one's intentions or actions. While overtness implies honesty and straightforwardness, these antonyms suggest covert behavior and an unwillingness to reveal one's true motives.