adamant

1. n. A stone imagined by some to be of impenetrable hardness; a name given to the diamond and other substances of extreme hardness; but in modern mineralogy it has no technical signification. It is now a rhetorical or poetical name for the embodiment of impenetrable hardness. Source: opted

2. n. Lodestone; magnet. Source: opted

3. adj. impervious to pleas, persuasion, requests, reason Source: wordnet

4. n. very hard native crystalline carbon valued as a gem Source: wordnet

5. 1. A stone imagined by some to be of impenetrable hardness; a name given to the diamond and other substance of extreme hardness; but in modern minerology it has no technical signification. It is now a rhetorical or poetical name for the embodiment of impenetrable hardness. Opposed the rocky orb Of tenfold adamant, his ample shield. Milton. 2. Lodestone; magnet. [Obs.] "A great adamant of acquaintance." Bacon. As true to thee as steel to adamant. Greene. Source: webster

6. j:100 s. impervious to pleas, persuasion, requests, reason; she would have none of him"- W.Churchill Source: ecdict

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