gainsay
US /ˌɡeɪnˈseɪ/
UK /ˌɡeɪnˈseɪ/
1.
deny or contradict (a fact or statement)
:
•
The evidence was too strong to gainsay.
•
No one could gainsay her claim to the inheritance.
2.
speak against or oppose (someone)
:
•
It was useless to gainsay him, as he was determined to go.
•
She was too polite to gainsay her elders.