Meaning

noun a period of calm weather

noun an untroubled state; free from disturbances

noun the absence of sound

originFrom Middle English quiete, from Old French quiet (adjective) and quiete (noun), from Latin quiētus, past participle of quiēscere (“to keep quiet, rest”), ultimately from Proto-Indo-European *kʷyeh₁- (“rest”). Doublet of coy, quit, quite, and quietus. Largely displaced native English still in the sense of "with little or no sound".

Etymology from Wiktionary, CC BY-SA 3.0