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English definition of “undeniable”

undeniable

adjective [not gradable]    /ˌʌn·dɪˈnɑɪ·ə·bəl/
so obviously true that it cannot be doubted : It is an undeniable fact that ice is cold . undeniably    /ˌʌn·dɪˈnɑɪ·ə·bli/ adverb [not gradable] She is undeniably brilliant .
(Definition of undeniable adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
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