The term "reason whys" is not an actual word or phrase, but rather a combination of two words. Reason means the cause or justification for an action or event, while whys refer to the specific questions about the reason. As there is no specific word for "reason whys," it is impossible to provide antonyms for it. However, some antonyms for the word reason can include irrationality or unreasonableness, meaning without logic or common sense. Similarly, for whys, antonyms can include ignorance, meaning lack of knowledge or understanding, or indifference, meaning a lack of interest or concern for the reason.