While "calmest" is a word, it is not typically used to describe a state of being calm in a comparative way. "Most calmly" emphasizes the highest degree of calmness.
For example:
* "He handled the situation most calmly of all the people involved."
While "calmest" is a word, it is not typically used to describe a state of being calm in a comparative way. "Most calmly" emphasizes the highest degree of calmness.
For example:
* "He handled the situation most calmly of all the people involved."