knell
noun/nel/
/nel/
(also death knell)
[singular]- an event that means that the end or destruction of something will come soonWord OriginOld English cnyll (noun), cnyllan (verb), of West Germanic origin; related to Dutch knal (noun), knallen (verb) ‘bang, pop, crack’. The current spelling (dating from the 16th cent.) is perhaps influenced by bell.
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knell