Synonyms of adamantine

adamantine

adjective

ˌa-də-ˈman-ˌtēn 

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

Synonyms & Similar Words

• adamant
• stubborn
• steadfast
• hardened
• implacable
• obdurate
• immovable
• unyielding
• unbending
• obstinate
• intransigent
• mulish
• inflexible
• unrelenting
• uncompromising
• ossified
• pertinacious
• hard
• willful
• bullheaded
• obsessive
• hardheaded
• dogged
• opinionated
• pat
• headstrong
• iron
• perverse
• persistent
• strict
• determined
• pigheaded
• hard-nosed
• relentless
• inconvincible
• inexorable
• self-willed
• rigid
• unflinching
• stiff-necked
• deaf to reason
• tenacious
• resolved
• stern
• self-opinionated
• severe
• defiant
• wrongheaded
• wayward
• unconquerable
• invincible
• firm
• indomitable
• hard-line
• intractable
• hidebound
• contumacious
• cantankerous
• hard-shell
• contrary
• refractory
• unmanageable
• recalcitrant
• single-minded
• stouthearted
• uncooperative
• ungovernable
• disobedient
• mutinous
• inveterate
• set
• anal-retentive
• bloody-minded
• unruly
• narrow-minded
• confirmed
• hell-bent
• cussed
• insubordinate
• exacting
• insurgent
• froward
• demanding
• unregenerate

Antonyms & Near Antonyms

• flexible
• agreeable
• acquiescent
• amenable
• pliant
• complying
• pliable
• compliant
• yielding
• obedient
• docile
• tractable
• submissive
• willing
• accepting
• receptive
• responsive
• reasonable
• placable
• relenting
• manageable
• temperate
• slavish
• persuadable
• subservient
• governable

Example Sentences

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

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