What is another word for simmer down?
Pronunciation: [sˈɪmə dˈa͡ʊn] (IPA) 
Simmer down is a common phrase that means to become less excitable or agitated. There are numerous synonyms for this phrase, including calm down, cool off, ease up, settle down, mellow out, and chill out. Each of these phrases suggests a similar meaning, and they are often used interchangeably depending on the context. While simmer down is often used to describe a person's emotional state, it can also refer to the intensity of a situation or event. In any case, synonyms for simmer down can be useful when trying to convey a message of peace, relaxation, or tranquility.
