Synonyms of 'quietus'
deathDictionary, end, finish
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coup de grâce
a mortal or finishing blow, esp one delivered as an act of mercy to a sufferer
His affair administered the coup de grâce to their marriage.
Death is the permanent end of the life of a person or animal.
There had been a death in the family.
Thesaurus for quietus from the Collins English Thesaurus
anything that serves to quash , eliminate , or kill