calmyoudaoicibaDictYouDict[calm 词源字典]
calm: [14] The underlying meaning of calm seems to be not far removed from ‘siesta’. It comes ultimately from Greek kauma ‘heat’, which was borrowed into late Latin as cauma. This appears to have been applied progressively to the ‘great heat of the midday sun’, to ‘rest taken during this period’, and finally to simply ‘quietness, absence of activity’. Cauma passed into Old Italian as calma, and English seems to have got the word from Italian.
[calm etymology, calm origin, 英语词源]
calm (adj.)youdaoicibaDictYouDict
late 14c., from Old French calme "tranquility, quiet," traditionally from Old Italian calma, from Late Latin cauma "heat of the mid-day sun" (in Italy, a time when everything rests and is still), from Greek kauma "heat" (especially of the sun), from kaiein "to burn" (see caustic). Spelling influenced by Latin calere "to be hot." Figurative application to social or mental conditions is 16c.
calm (n.)youdaoicibaDictYouDict
late 14c., from Old French calme, carme "stillness, quiet, tranquility," from the adjective (see calm (adj.)).
calm (v.)youdaoicibaDictYouDict
late 14c., from Old French calmer or from calm (adj.). Related: Calmed; calming.