whir (v.)youdaoicibaDictYouDict[whir 词源字典]
c. 1400, Scottish, "fling, hurl," probably from Old Norse hvirfla, frequentative of hverfa "to turn" (see wharf). Compare Danish hvirvle, Dutch wervelen, German wirbeln "to whirl." Related: Whirred; whirring.[whir etymology, whir origin, 英语词源]