incontrovertible

American  

[in-kon-truh-vur-tuh-buhl, in-kon-] / ˌɪn kɒn trəˈvɜr tə bəl, ɪnˌkɒn- /

adjective

1. not controvertible; not open to question or dispute; indisputable.

   absolute and incontrovertible truth.

   Synonyms:

   unquestionable, undeniable, incontestable

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incontrovertible British  

/ ɪnˌkɒn-, ˌɪnkɒntrəˈvɜːtəbəl /

adjective

1. incapable of being contradicted or disputed; undeniable

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Other Word Forms

• incontrovertibility noun
• incontrovertibleness noun
• incontrovertibly adverb

Etymology

Origin of incontrovertible

First recorded in 1640–50; in- ³ + controvertible ( def. )

Example Sentences

Start with some incontrovertible rules to live by.

From MarketWatch • Jan. 9, 2026

"I was not persuaded that even if a survey was carried out, that it would be conclusive one way or the other, that it would produce incontrovertible data."

From BBC • Nov. 25, 2025

For Nikki, who died Monday at 81, our future depends upon our willingness to learn from everyday Black folks’ refusal to accept status-quo cruelties as incontrovertible realities.

From Los Angeles Times • Dec. 15, 2024

His presence was proof of an incontrovertible fact about the festival, now in its second week: Cannes loves dogs.

From New York Times • May 21, 2024

They all talked at once, their voices insistent and contradictory and impatient, making of unreality a possibility, then a probability, then an incontrovertible fact, as people will when their desires become words.

From "The Sound and the Fury" by William Faulkner