Boil over is a term used to describe a situation where emotions or tensions reach a point where they become uncontrollable. The antonyms for the word boil over are stay calm, remain composed, restrain oneself and contain emotions. These words are used to describe a situation where one maintains their cool and keeps their emotions in check. This can be achieved through deep breathing, meditation or simply taking a break to calm down. In situations where tensions are high, it is important to keep a level head to avoid any negative or irreversible consequences. Hence, the antonyms of boil over play an important role in maintaining a peaceful and stable environment.