nt, -mant]
| 1. | utterly unyielding in attitude or opinion in spite of all appeals, urgings, etc. |
| 2. | too hard to cut, break, or pierce. |
| 3. | any impenetrably or unyieldingly hard substance. |
| 4. | a legendary stone of impenetrable hardness, formerly sometimes identified with the diamond. |

ad·a·mant (ād'ə-mənt, -mānt') adj. Impervious to pleas, appeals, or reason; stubbornly unyielding. See Synonyms at inflexible. n.
[From Middle English, a hard precious stone, from Old French adamaunt, from Latin adamās, adamant-, from Greek, unconquerable, hard steel, diamond; see demə- in Indo-European roots.] ad'a·man·cy n., ad'a·mant·ly adv. |
Adamant
(Heb. shamir), Ezek. 3:9. The Greek word adamas means diamond. This stone is not referred to, but corundum or some kind of hard steel. It is an emblem of firmness in resisting adversaries of the truth (Zech. 7:12), and of hard-heartedness against the truth (Jer. 17:1).