The word 'Calm' refers to a state of tranquility, peace, or absence of agitation and disturbance. When someone is calm, they are not experiencing strong emotions, such as anger or excitement, and they are often able to think clearly and make rational decisions. The term can apply to both feelings and situations, such as calm waters or calm weather.
The word 'calm' comes from the Old French 'calme,' which originated from the Latin 'cauma,' meaning 'heat of the day' (which implies a state of rest). It has evolved in English to denote a broader sense of peacefulness and lack of disturbance.