"discharge, clearing of accounts," 1530s, short for Medieval Latin phrase quietus est "he is quit" (see quit). Hence, "death" (i.e. "final discharge"), c. 1600. Latin quies also was used for "the peace of death."
权威例句
1. After a quietus of twenty years she returned.
她隐退二十年后又东山再起.
2. The plan has finally got its quietus, ie been abandoned.