knell (n.)youdaoicibaDictYouDict[knell 词源字典]
Old English cnyll "sound made by a bell when struck or rung slowly," perhaps of imitative origin. The Welsh cnull "death-bell" appears to be a borrowing from English. For vowel evolution, see bury.[knell etymology, knell origin, 英语词源]
knell (v.)youdaoicibaDictYouDict
Old English cnyllan "to toll a bell; strike, knock," cognate with Middle High German erknellen "to resound," Old Norse knylla "to beat, thrash;" probably imitative. Related: Knelled; knelling.