deny vs negate

deny and negate both are verbs.

Word	Noun	Adjective	Verb	Adverb
deny	No	No	Yes	No
negate	No	No	Yes	No

As verbs, negate is a hypernym of deny; that is, negate is a word with a broader meaning than deny:

Other hypernyms of deny include contradict, contravene.

deny (verb)	negate (verb)
declare untrue; contradict	make ineffective by counterbalancing the effect of
refuse to accept or believe	prove negative; show to be false
refuse to recognize or acknowledge	deny the truth of
deny formally (an allegation of fact by the opposing party) in a legal suit	be in contradiction with
refuse to let have
refuse to grant, as of a petition or request
deny oneself (something); restrain, especially from indulging in some pleasure