The term sayso refers to the authority or influence that someone has over others, often based on their position, reputation or power. Some antonyms for sayso would include submission, acquiescence, and obedience, which suggest a lack of power or influence over others. Other antonyms for sayso may include modesty, humility or reticence, which refer to the characteristic of being reserved or modest in one's influence or power. Alternatively, some antonyms may include disapproval, criticism or opposition, which indicate a negative response to the authority or influence of the person in question. In general, antonyms for sayso tend to express a lack of power or influence, or a negative response to such influence.