"Making teeth chatter" is a phrase commonly used to describe extreme cold or fear. Antonyms for this expression would be words that describe the opposite of such a sensation. These could include "warm," "calming," "soothing," "pleasant," "comforting," or "relaxing." All these words describe a sensations that are opposite of teeth chatter. For instance, being in a warm and comfortable setting, serenely pacifying situation or having some soothing and encouraging words can help to calm your nerves and bring tranquility, which is the complete opposite of the teeth chattering experience. Whether it is a cold weather or a scary scenario, these antonyms can help to create a less alarming and more enjoyable environment.