The superlative form of calm; the most peaceful, serene, or untroubled.
From 'calm' with the superlative suffix '-est'. 'Calm' comes from Old French 'calme' and likely from Italian 'calma', possibly from Greek 'kauma' (heat of sun causing stillness).
The calmest person in a room often becomes an anchor for everyone else's emotions—studies show that calm is contagious, and someone's peaceful breathing and steady voice can physiologically lower others' cortisol levels.
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