undeniable

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

ADJECTIVE

definite, proven

Synonyms

STRONGEST

certain evident indisputable irrefutable obvious unassailable unquestionable

WEAK

actual beyond doubt beyond question binding clear compulsory for sure inarguable incontestable incontrovertible indubitable manifest necessary no ifs and or buts obligatory open and shut patent positive real sound sure sure thing true unanswerable undoubted

Antonyms

STRONGEST

disputable doubtful dubious indefinite obscure questionable refutable uncertain unclear unreliable unsure vague

WEAK

contestable doubted unproven

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.

"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

"To wage this moral and legal crusade, we have appointed a team of seasoned professionals with undeniable expertise," Fall announced in Paris, flanked by members of the FSF legal team.

From BBC • Mar. 26, 2026

I like Dusting best, for its undeniable logic and a certain kind of austere beauty.

From "Nickel and Dimed: On (Not) Getting By in America" by Barbara Ehrenreich

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