The state of being peaceful, quiet, and free from worry, anger, or violent motion.
From 'calm' (from Greek 'kauma,' meaning 'heat' or 'burning,' referring to still air in hot weather) plus the noun-forming suffix '-ness.' The Greeks associated stillness with the absence of hot winds.
The root of 'calm' relates to the Greek idea of heat—in ancient times, the calmest days were those without the burning sun and hot winds, so peacefulness was literally connected to cool, still air!
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