/ kwaɪˈiːtəs; NAmE / noun [ C , U ] ( literary )
1.
death, or sth that causes death, considered as a welcome end to life
2.
something that makes a person or situation calm
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WORD ORIGIN
late Middle English : abbreviation of medieval Latin quietus est he is quit (see quit ), originally used as a form of receipt or discharge on payment of a debt.