The term "most chattering" refers to someone who talks too much or incessantly. The antonyms of "most chattering" are "quiet," "reserved," "reticent," "shy," "silent," "restrained," "uncommunicative," and "taciturn." Someone who is quiet or silent speaks very little, while someone who is reserved or reticent may speak more, but they are cautious about what they say. A person who is shy may not speak much in social situations due to nervousness or timidity. On the other hand, someone who is restrained or taciturn is someone who chooses to speak less in order to listen more or maintain a sense of dignity.