ADAMANTINE Synonyms: 112 Similar and Opposite Words

adamantine

adjective

ˌa-də-ˈman-ˌtēn

Definition of adamantine

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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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

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 Image My first collision with the adamantine wall of Vivamayr house rules coincided with my arrival. — Caity Weaver, New York Times, 25 Jan. 2025 This poor little deer had to be sacrificed by your adamantine reviewer to show you how the new tool works. — PCMAG, 30 May 2024 She is known for her aphoristic precision and intense, adamantine paragraphs. — Matthew Gavin Frank, Harper's Magazine, 21 Feb. 2022 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

Schnell was adamant that the film crew couldn’t provide any help to him.

— Georg Szalai, HollywoodReporter, 17 Oct. 2026
Lander was adamant that rezonings didn’t have to go the way of Williamsburg.

— Kim Velsey, Curbed, 9 Oct. 2026

Definition of adamant

Adjective

Meanwhile, waiting in the wings is a man of few words — and initially, few feelings, or so thinks Marianne — the steadfast Colonel Brandon (Herbert Nordrum).

— ABC News, ABC News, 14 Oct. 2026
The poem continues with more verses about Burns’s steadfast love, but beyond that, nothing really happens.

— René Ostberg, Encyclopedia Britannica, 14 Oct. 2026

Definition of steadfast

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adamantine

adapt

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“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 21 Oct. 2026.

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Synonyms of adamantine

adjective

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