Meaning

adjective affectedly modest or shy especially in a playful or provocative way

adjective showing marked and often playful or irritating evasiveness or reluctance to make a definite or committing statement

adjective modestly or warily rejecting approaches or overtures

originFrom Middle English coy, from Old French coi, earlier quei (“quiet, still”), from Latin qu(i)ētus (“resting, at rest”). Doublet of quit, quiet, quite, and quietus.

Etymology from Wiktionary, CC BY-SA 3.0