Chunter, meaning to talk or grumble continuously, has several antonyms that convey the opposite of the word's meaning. One such antonym is "listen," which suggests paying attention to what someone else is saying instead of talking endlessly. Another antonym is "quiet," which indicates the state of being still and silencing oneself to give others a chance to speak. Other antonyms of chunter include "concise," "brief," "succinct," and "to the point." All of these antonyms refer to communication that is clear, concise, and well-considered, in stark contrast to the rambling, aimless chatter associated with chuntering.