c. 1300, "freedom from disturbance or conflict; calm, stillness," from Old French quiete "rest, repose, tranquility" and directly from Latin quies (genitive quietis) "a lying still, rest, repose, peace" (from PIE root *kweie- "to rest, be quiet").
From late 14c. as "inactivity, rest, repose;" from c. 1400 as "absence of noise."
early 14c., "quiet, modest, demure," from Old French coi, earlier quei "quiet, still, placid, gentle," ultimately from Latin quietus "free; calm, resting" (from PIE root *kweie- "to rest, be quiet"). Meaning "shy, bashful" emerged late 14c. Meaning "unwilling to commit" is by 1961. Related: Coyly; coyness.
early 14c., pesful, peesfull, paisful, "inclined to peace, friendly, pacific;" mid-14c. as "tranquil, calm, full of peace;" from peace + -ful. In reference to nonviolent methods of effecting social change, it is attested from 1876. Related: Peacefully; peacefulness. Peaceful coexistence (1920) originally was in regard to Soviet policy toward the capitalist West.
mid-15c., serenite, "fair, calm, clear weather," from Old French (Modern French sérénité) and directly from Latin serenitatem (nominative serenitas) "clearness, serenity," from serenus (see serene). Of persons, "tranquility of mind or temper," by 1590s. Also formerly used as a title of honor for kings (mid-15c.), probably from the similar use of Latin serenitas, which was applied to Roman emperors and later to popes.
c. 1200, "excused, exempt, free, clear" (of debt, obligation, penalty, etc.), from Old French quite, quitte "free, clear, entire, at liberty; discharged; unmarried," and directly from Medieval Latin quitus, quittus, from Latin quietus "free" (in Medieval Latin "free from war, debts, etc."), also "calm, resting" (from PIE root *kweie- "to rest, be quiet").
From mid-13c. as "deprived of." From c. 1300 of real property, "exempt from taxes or other dues or claims."