quietus

 
Pronunciation: /kwʌɪˈiːtəs/

noun (plural quietuses)

literary
  • death or something that causes death, regarded as a release from life.
  • archaic something that has a calming or soothing effect.

Origin:

late Middle English: abbreviation of medieval Latin quietus est 'he is quit' (see quit1), originally used as a form of receipt or discharge on payment of a debt