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
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
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
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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What is that key meant to represent, and why was Mycroft so adamant about Sherlock literally and figuratively closing that book and moving on with his life?—
Max Gao,
Variety,
5 Mar. 2026
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Getting everyone on board As the legislative committee develops initiatives to help cut down red tape, Wicks is adamant that new state regulations are just one piece of the puzzle that municipalities must also solve.—
Amancai Biraben,
Daily News,
4 Mar. 2026
Adjective
-
Early connections should feel easier as affectionate Venus forms a supportive sextile with intense Pluto, encouraging us to handle stubborn issues with honest talks and practical teamwork.—
Tarot.com,
Hartford Courant,
10 Mar. 2026
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Spend less time focusing on prep and cleaning and more time focusing on the food with our favorite kitchen tools, which can make poached eggs in minutes, reseal bags of ingredients, open stubborn jars, and more.—
Caley Sturgill,
Southern Living,
10 Mar. 2026
Adjective
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Not all the time, not in a deeply debilitating way, but enough that his ongoing battle with right-knee tendinitis has become part of his tennis-playing identity — as much as his astute court acumen, steadfast competitiveness and Southern California charisma.—
Douglas Robson,
Los Angeles Times,
9 Mar. 2026
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Guardians, Clase want answers about his salary Whereas Ortiz’s counsel asked for the trial to be pushed to a later date, Clase’s camp has been steadfast that the trial remain in May.—
Zack Meisel,
New York Times,
7 Mar. 2026
Adjective
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The medical examiner ruled her death the result of atherosclerotic cardiovascular disease, or hardened arteries, possibly due to a hereditary disorder.—
Shambhavi Rimal,
Fort Worth Star-Telegram,
6 Mar. 2026
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The tool will also ship with either a graphite marking tip - essentially a compact graphite pencil for layout work - or a hardened metal scribing tip for marking metal surfaces.—
Omar Kardoudi
March 05,
New Atlas,
5 Mar. 2026
Cite this Entry
“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 12 Mar. 2026.
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