adamant
/ˈæd.ə.mənt/ noun C2- An unspecified mineral or rock of virtually impenetrable hardness.
- In later use: diamond.
- A substance that neutralizes lodestones.
- Chiefly in of adamant: an embodiment of impenetrable hardness; the quality of not being easily destroyed or overcome; impenetrableness, imperviousness, impregnableness; also, of a person: the quality of not being easily affected emotionally; impassiveness, unmovableness.
Plural adamants
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