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Synonyms

undeniable

American  
[uhn-di-nahy-uh-buhl] / ˌʌn dɪˈnaɪ ə bəl /

adjective

  1. incapable of being denied or disputed.

    undeniable evidence of arson.

    Synonyms:
    sure, certain, clear, evident, obvious, unquestionable, incontestable, incontrovertible
  2. not open to refusal.

    an undeniable call for help.

  3. unquestioned as to quality, merit, etc.; indisputably good.

    undeniable artistic talent.


undeniable British  
/ ˌʌndɪˈnaɪəbəl /

adjective

  1. unquestionably or obviously true

  2. of unquestionable excellence

    a man of undeniable character

  3. unable to be resisted or denied

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • undeniableness noun
  • undeniably adverb

Etymology

Origin of undeniable

First recorded in 1540–50; un- 1 + deniable

Explanation

Something undeniable is clearly true: it's undeniable that water is wet and the sky is blue. Undeniable things are obviously, clearly, totally, blatantly true, so true that it would be crazy to deny them. If you spilled soup in your lap, it's undeniable that you're wet and probably embarrassed. It's undeniable that a lot of dogs like chasing squirrels. On the other hand, it's undeniable that not everything is that simple. One person might deny what another thinks is flat-out undeniable.

Keep Reading on Vocabulary.com

Vocabulary lists containing undeniable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Puppet magic, though it may come in and out of fashion, is ancient and undeniable.

From Los Angeles Times • Apr. 13, 2026

"We spent a decade learning that social media companies will not self-regulate. We have now perhaps 18 months before the same lesson becomes undeniable for AI."

From Barron's • Apr. 10, 2026

What they are is addictive, catchy, energizing and undeniable.

From Salon • Apr. 4, 2026

With social media, it may be difficult to prove causation for an individual, but once we consider population-level research, the link is undeniable, as it was with tobacco.

From The Wall Street Journal • Mar. 30, 2026

He banned for life all the players involved in the fix because of their undeniable dealings with gamblers.

From "1919 The Year That Changed America" by Martin W. Sandler