ne ‧ gate AC /nɪˈɡeɪt/ BrE AmE 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 SYN deny