The term "yakety yaks" is often used to describe excessive chatter, but there are many antonyms that can be used to convey silence and restraint. Some examples include quiet, hush, stillness, calm, peace, and tranquility. Other antonyms to describe someone who is not talkative could be introverted, shy, quiet, reserved, or reticent. Alternatively, antonyms for excessive chatter could be control, self-restraint, discipline, tact, and diplomacy. The key is to use the right word to convey the intended message and create a clear and concise meaning in any context.