negate

UK: /nɪˈɡeɪt/ US: /nɪˈgeɪt, ˈnɛgeɪt/ ,(ni gāt′, neg′āt)

Inflections of 'negate' (v): (⇒ conjugate)

negates

v 3rd person singular

negating

v pres p

negated

v past

negated

v past p

WordReference Random House Learner's Dictionary of American English © 2025

ne•gate /nɪˈgeɪt, ˈnɛgeɪt/   v. [~ + object] , -gat•ed, -gat•ing. 

1. to deny the existence, evidence, or truth of (something):
   negated our beliefs.
2. to cause to be ineffective or useless:
   He negated all attempts to help.

See -neg-.

WordReference Random House Unabridged Dictionary of American English © 2025

ne•gate  (ni gāt′, neg′āt), v., -gat•ed, -gat•ing. 
v.t. 

1. to deny the existence, evidence, or truth of:
   an investigation tending to negate any supernatural influences.
2. to nullify or cause to be ineffective:
   Progress on the study has been negated by the lack of funds.

v.i. 

3. to be negative;
   bring or cause negative results:
   a pessimism that always negates.

• Latin negātus (past participle of negāre to deny, refuse), equivalent. to neg- (variant of nec not; see neglect) + -ā- theme vowel + -tus past participle suffix
• 1615–25

ne•ga′tor, ne•gat′er, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

negate / nɪˈɡeɪt/ verb (transitive)

1. to make ineffective or void; nullify; invalidate
2. to deny or contradict

Etymology: 17th Century: from Latin negāre, from neg-, variant of nec not + aio I say