Meaning

verb declare untrue; contradict

verb refuse to accept or believe

verb refuse to grant, as of a petition or request

originFrom Middle English denyen, from Old French denoier (“to deny, to repudiate”) (French dénier), from Latin denegare (“to deny, to refuse”), from de- (“away”) and negare (“to refuse”), the latter ultimately from Proto-Indo-European *né (“no, not”). Doublet of denegate.

Etymology from Wiktionary, CC BY-SA 3.0