Plural of coy; can also mean people who are shy or evasive, or third-person singular present tense of the verb 'coy'.
Plural form created by adding '-s' to 'coy', which comes from Old French 'coi' (quiet) with roots in Latin 'quietus'.
English treats some adjectives as nouns—you can say 'the coys' to mean coy people, though it's not common, showing how flexible English can be in converting words between parts of speech.
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