adamantine.
Synonym of adamant.
Meaning & usage
Synonym of adamant. Made of adamant (“an unspecified mineral or rock of virtually impenetrable hardness”).
Synonym of adamant. Incapable of being broken, dissolved, or penetrated; impenetrable, unbreakable.
adamantine bonds adamantine chains
Synonym of adamant. Difficult to defeat or prevail over; unshakable, unyielding.
Synonym of adamant. Of a person: refusing to change one's mind; obstinate, stubborn.
Synonym of adamant. Having the quality of attracting or drawing; attractive, magnetic.
Like diamond in lustre; bright, lustrous, shiny; also, of a lustre: like that of a mineral with a high refractive index such as diamond.
Where this word comes from
From Middle English adamantine, adamantyne, adamauntyn (“(adjective) of adamant; (noun) adamant”), from Anglo-Norman adamantin and Middle French adamantin (“of or resembling adamant or diamond”) (modern French adamantin), and from its etymon Latin adamantinus (“adamantine”), from Ancient Greek ἀδᾰμάντῐνος (adămántĭnos, “hard as adamant; made of steel”), from ᾰ̓δᾰμᾰντ- (ădămănt-) (a stem of ἀδάμᾱς (adámās, “the hardest metal (probably steel); diamond”), possibly originally Semitic) + -ῐνος (-ĭnos, suffix meaning ‘made of’ forming adjectives). By surface analysis, adamant + -ine (suffix meaning ‘of or pertaining to’ forming adjectives). Etymology 1, adjective sense 1.2.4 (“having the quality of attracting or drawing”) and etymology 1, adjective sense 2 (“like diamond in lustre; etc.”) refer to adamant (“(archaic) lodestone; (historical, poetic) diamond”).
Synonym of adamantium (“a fictional metal which is indestructible or nearly so”).
Where this word comes from
Possibly from adamantium + -ine (suffix forming the names of chemical substances or materials).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.