true or certain; that cannot be denied synonym indisputable He had undeniable charm. It is an undeniable fact that crime is increasing. opposite deniable
deny verbdenial nounundeniable adjectiveundeniably adverb
NAmE//ˌʌndɪˈnaɪəbli//
adverb undeniably impressive He is, undeniably, an excellent player.See undeniable in the Oxford Advanced Learner's DictionaryCheck pronunciation: undeniable