incontrovertible
Americanadjective
adjective
Other Word Forms
Etymology
Origin of incontrovertible
First recorded in 1640–50; in- 3 + controvertible ( def. )
Explanation
When something is incontrovertible, it is undeniably, absolutely, 100 percent, completely true. That rain is wet is an incontrovertible fact. If you look at incontrovertible, you see that -controver-, as in controversy, is hiding inside. Add in the prefix, and it's easy to see that incontrovertible means there is no controversy about something, or, in other words, it is unchangeable and true. Incontrovertible evidence or proof is what you are looking for if you suspect that someone is doing something wrong.
Vocabulary lists containing incontrovertible
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The Namesake
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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.
Observations of the cosmic radiation background provide nearly incontrovertible proof of the big bang.
From The Wall Street Journal • May 19, 2026
If the allegations are false, he needs to refute each and every detail in thorough, incontrovertible fashion.
From Los Angeles Times • Apr. 10, 2026
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
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
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
