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
During Vargas Llosa’s lifetime, his political beliefs underwent extreme changes, from supporting Castro’s revolutionary Communism to championing traditional European liberalism, which included an adamantine belief in unregulated markets.
—
Literary Hub, 26 Feb. 2026
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
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
Literary Hub, 26 Feb. 2026
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
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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Warsh would take the chairmanship at a complicated time, given that a spike in gas prices could keep the central bank from lowering interest rates — a move that Trump has been adamant on.—
Sarah Min,
CNBC,
24 Apr. 2026
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Trump has been adamant that Iran give up its nuclear power ambitions and reopen the Strait of Hormuz in order for the war to end.—
Mabinty Quarshie,
The Washington Examiner,
24 Apr. 2026
Adjective
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Jared Speight is a stubborn titan of Long Island abstraction when star writer Roxy Margaux first becomes infatuated with his bravado.—
Greg Evans,
Deadline,
28 Apr. 2026
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For concrete or tile, a mild cleaner helps remove the stubborn pollen film that builds up over spring months.—
Lauren Jarvis-Gibson,
Fort Worth Star-Telegram,
27 Apr. 2026
Adjective
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But certainly nothing may have damaged their trust more than the steadfast assertions that the COVID vaccines were able to stop infection and transmission.—
Ian Miller OutKick,
FOXNews.com,
27 Apr. 2026
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Their families both have expressed steadfast support of Broadnax's execution.—
Amanda Lee Myers,
USA Today,
25 Apr. 2026
Adjective
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They were armed with powerful, hardened beaks and likely had high intelligence.—
Jacek Krywko,
ArsTechnica,
24 Apr. 2026
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This long-range missile has been operational since 2006 and is designed for deep strikes against hardened targets.—
Sujita Sinha,
Interesting Engineering,
21 Apr. 2026
Cite this Entry
“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 30 Apr. 2026.
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