negate
[verb]
Synonyms:
- invalidate, annul, cancel, countermand, neutralize, nullify, obviate, reverse, wipe out
- deny, contradict, disallow, disprove, gainsay (archaic or literary), oppose, rebut, refute

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Antonyms: affirm

[TahlilGaran] English Synonym Dictionary ▲

ne‧gate AC /nɪˈɡeɪt/ verb [transitive] formal
[Word Family: verb: negate; noun: negation]
[Date: 1600-1700; Language: Latin; Origin: past participle of negare 'to say no', from neg- 'no, not']

1. to prevent something from having any effect:
Efforts to expand the tourist industry could be negated by reports that the sea is highly polluted.

2. to state that something does not exist or is untrue Synonym : deny

[TahlilGaran] Dictionary of Contemporary English ▲