as in unquestionable
not capable of being challenged or proved wrong
the contention that there are certain unchallengeable rules governing proper grammar
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Recent Examples of unchallengeable
Californians have been conditioned to consider recycling to be an unchallengeable proposition.
—
Kerry Jackson, Oc Register, 4 Feb. 2026
The lens of the hearing never focused on Robeson, who was seen as only a prop for Robinson’s patriotism, unworthy of rediscovery, especially as the Robinson/Rickey integration story—sports as the pathway to equality—became virtually unchallengeable.
—Literary Hub, 21 Jan. 2026
Regular board and executive succession planning, with a balance of independent directors, can ensure the right questions are asked and no single person becomes unchallengeable.
—James Henderson, Forbes, 4 Dec. 2024
Unlike Biden, Trump’s intraparty position is nearly unchallengeable.
—The Editors, National Review, 3 July 2024
No longer having to play cosmetic chemist is an unchallengeable win.
—Essence, 23 Oct. 2023
This was rooted in a calculation that America’s greatest source of strength was global perceptions of the country as unchallengeable.
—Max Fisher, New York Times, 18 Mar. 2023
In the heady days after the Cold War, the order appeared both unchallenged and unchallengeable.
—Ivo Daalder, Foreign Affairs, 21 June 2022
Alternatively, maybe journalists and, later, historians, felt that to focus on the unsolved mystery of the break-in would somehow diminish the unchallengeable fact of Nixon’s guilt in the cover-up and various other scandals unearthed in the Watergate investigations and after.
—Timothy Noah, The New Republic, 17 June 2022
Kerry Jackson, Oc Register, 4 Feb. 2026
The lens of the hearing never focused on Robeson, who was seen as only a prop for Robinson’s patriotism, unworthy of rediscovery, especially as the Robinson/Rickey integration story—sports as the pathway to equality—became virtually unchallengeable.
—Literary Hub, 21 Jan. 2026
Regular board and executive succession planning, with a balance of independent directors, can ensure the right questions are asked and no single person becomes unchallengeable.
—James Henderson, Forbes, 4 Dec. 2024
Unlike Biden, Trump’s intraparty position is nearly unchallengeable.
—The Editors, National Review, 3 July 2024
No longer having to play cosmetic chemist is an unchallengeable win.
—Essence, 23 Oct. 2023
This was rooted in a calculation that America’s greatest source of strength was global perceptions of the country as unchallengeable.
—Max Fisher, New York Times, 18 Mar. 2023
In the heady days after the Cold War, the order appeared both unchallenged and unchallengeable.
—Ivo Daalder, Foreign Affairs, 21 June 2022
Alternatively, maybe journalists and, later, historians, felt that to focus on the unsolved mystery of the break-in would somehow diminish the unchallengeable fact of Nixon’s guilt in the cover-up and various other scandals unearthed in the Watergate investigations and after.
—Timothy Noah, The New Republic, 17 June 2022
Recent Examples of Synonyms for unchallengeable
Adjective
-
In the eyes of hard-liners, Khamenei stood as the unquestionable authority — below only that of God.—
Lee Keath,
Fortune,
1 Mar. 2026
-
In the eyes of hard-liners, Khamenei stands as the unquestionable authority — below only that of God.—
Dallas Morning News,
Dallas Morning News,
28 Feb. 2026
Adjective
-
Nefarious actors shape elections without leaving irrefutable evidence of ballot manipulation.—
Andrew Latham,
The Conversation,
3 Mar. 2026
-
Lázaro brings an irrefutable truth in his work and being able to follow the development process so closely has been an honor.—
Rafa Sales Ross,
Variety,
18 Feb. 2026
Adjective
-
But this case does not turn on these indisputable facts.—
Lauren Costantino,
Miami Herald,
4 Mar. 2026
-
Hurricane Beryl wreaked havoc on the cluster of cool, casual beach bars and seaside eateries that made this area the indisputable heart of the island.—
Carley Rojas Avila,
Travel + Leisure,
3 Mar. 2026
Adjective
-
Duesberg kept making his argument well after evidence that the human immunodeficiency virus, HIV, causes AIDS became incontestable.—
Business Columnist,
Los Angeles Times,
29 Jan. 2026
-
That is to say, there is no one pure ur-movie, unblemished and incontestable.—
Anthony Lane,
New Yorker,
22 Sep. 2025
Adjective
-
As of Saturday night, after Maxey took that nasty spill in the waning moments of the Philadelphia 76ers’ 125-116 loss to the Atlanta Hawks, there wasn’t anything conclusive on his status.—
Tony Jones,
New York Times,
8 Mar. 2026
-
Meta and other tech firms have long argued publicly that there is no conclusive evidence linking social media to addiction or other mental health challenges.—
CNN,
Mercury News,
24 Feb. 2026
Adjective
-
The feeling of well-being is tangible, and incontrovertible.—
Condé Nast Traveler,
Condé Nast Traveler,
22 Jan. 2026
-
Beauty’s at-times reluctance to embrace TikTok Shop as a channel mirrors the industry’s longtime disinclination toward Amazon, an attitude that has shifted in recent years as the e-commerce giant’s beauty business has grown at an incontrovertible clip.—
Noor Lobad,
Footwear News,
11 Nov. 2025
Adjective
-
Though his World Series moment didn’t occur with the Red Sox, the experience could lend insight into his new organization, which spent 86 years racking up similarly stunning last-second heartbreaks and unanswerable what-ifs.—
Gabrielle Starr,
Boston Herald,
11 Feb. 2026
-
Yet certain fundamental questions about the Fourier transform have remained stubbornly, and mysteriously, unanswerable.—
Leila Sloman,
Quanta Magazine,
28 Jan. 2026
Adjective
-
In 2025, Rebecca Yarros is that genre’s indubitable champion.—
Rebecca Yarros,
Vulture,
1 Dec. 2025
-
But while the trajectory is indubitable, the ascent is far from smooth, as Ghana’s recent experiences neatly encapsulate.—
Charlie Campbell,
Time,
30 Oct. 2025
Cite this Entry
“Unchallengeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unchallengeable. Accessed 10 Mar. 2026.
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