The antonyms for "says again" include keep quiet, silence, hush, and suppress. These words describe actions that are the opposite of repeating something that has already been said. When someone is encouraged to keep quiet, they are being advised not to speak, whereas, when someone is told to say again, they are being asked to repeat themselves. Similarly, when someone hushes, they are trying to quiet someone down, whereas when someone says again, they are trying to be heard more clearly. Lastly, suppressing something means preventing it from being expressed, whereas saying again is a form of expressing an idea or sentiment more than once.