quietus
/kwʌɪˈiːtəs
/noun (plural quietuses)
1 literary Death or something that causes death, regarded as a release from life.Then there are those who brim with passion not just for the state-approved quietus, but with fury for those who oppose it....
- Not the bloody quietus of Titus or Hamlet or Braveheart; it wasn't frank enough, nor so wrenching.
- His quietus is a great loss not only to the Tatas but also to the whole nation.
1.1 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.