as in adamant
sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion
the adamantine opposition of his parents to his marriage to a girl from a poor family
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Recent Examples of adamantine
Still, Naz, whose solitary ways confuse his family, very much wishes that Aziza wasn’t meeting his adamantine mother, Claudine (LaTanya Richardson Jackson), or his famous father, or his ex-state-senator older brother, Junior (Glenn Davis), recently incarcerated for embezzling campaign funds.
—
Helen Shaw, The New Yorker, 20 Mar. 2025
Image My first collision with the adamantine wall of Vivamayr house rules coincided with my arrival.
—Caity Weaver, New York Times, 25 Jan. 2025
Although Bush and Obama both flirted with what was once called entitlement reform, Trump and Biden now present themselves as adamantine defenders of Social Security and Medicare, each accusing the other of secretly aiming to cut those programs.
—Matthew Karp, Harper's Magazine, 2 Oct. 2024
This poor little deer had to be sacrificed by your adamantine reviewer to show you how the new tool works.
—PCMAG, 30 May 2024
At the Guggenheim Bilbao, at Glenstone, at SF MoMA and in St. Louis — in so many places around the world — Serra’s adamantine sculptures act on you.
—Sebastian Smee, Washington Post, 27 Mar. 2024
So contrary to what Gordon suggests, effective teaching, as Weber saw it, involves much more than pitting students’ opinions against adamantine facts.
—Peter E. Gordon, The New York Review of Books, 19 Nov. 2020
This view is much in vogue today, casting China not as a country that responds to pressure and incentives but as an adamantine force incapable of reacting to external stimuli.
—Julian Gewirtz, Foreign Affairs, 13 Oct. 2020
Helen Shaw, The New Yorker, 20 Mar. 2025
Image My first collision with the adamantine wall of Vivamayr house rules coincided with my arrival.
—Caity Weaver, New York Times, 25 Jan. 2025
Although Bush and Obama both flirted with what was once called entitlement reform, Trump and Biden now present themselves as adamantine defenders of Social Security and Medicare, each accusing the other of secretly aiming to cut those programs.
—Matthew Karp, Harper's Magazine, 2 Oct. 2024
This poor little deer had to be sacrificed by your adamantine reviewer to show you how the new tool works.
—PCMAG, 30 May 2024
At the Guggenheim Bilbao, at Glenstone, at SF MoMA and in St. Louis — in so many places around the world — Serra’s adamantine sculptures act on you.
—Sebastian Smee, Washington Post, 27 Mar. 2024
So contrary to what Gordon suggests, effective teaching, as Weber saw it, involves much more than pitting students’ opinions against adamantine facts.
—Peter E. Gordon, The New York Review of Books, 19 Nov. 2020
This view is much in vogue today, casting China not as a country that responds to pressure and incentives but as an adamantine force incapable of reacting to external stimuli.
—Julian Gewirtz, Foreign Affairs, 13 Oct. 2020
Recent Examples of Synonyms for adamantine
Adjective
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However, Skipper was adamant that the referee mistakenly listed him as eligible, not Decker, resulting in the Lions losing 20-19 to the Cowboys.—
DeJanay Booth-Singleton,
CBS News,
22 Jan. 2026
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Some of the bill’s legislative advocates last year were adamant its motivation was concern over safety and that the public doesn't know enough about the science.—
Paul Flahive,
Austin American Statesman,
21 Jan. 2026
Adjective
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Experts warn that the stubborn metric has long-term implications for learning.—
Kate Armanini,
Chicago Tribune,
26 Jan. 2026
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Wait 10 minutes before washing for milder stains or up to a week for more severe or stubborn stains.—
Brandee Gruener,
Southern Living,
26 Jan. 2026
Adjective
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His madman approach seems to not be working, as the EU seems steadfast against him (while here at home, President Gordo’s madness is still very evident).—
Voice of the People,
New York Daily News,
24 Jan. 2026
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All the while we will be encouraged by our steadfast belief that the sacred garment that is our country needs us, its warp and weft threads.—
Scott Santarosa,
San Diego Union-Tribune,
23 Jan. 2026
Adjective
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The greatest concern, however, is over the Ghwayran Prison in al-Hasakah, where thousands of hardened ISIS inmates are still being held.—
Omar Abdulkader,
CBS News,
20 Jan. 2026
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The Torah calls it a hardened heart.—
Rabbi Bruce D. Forman,
Sun Sentinel,
13 Jan. 2026
Cite this Entry
“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 31 Jan. 2026.
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