"granitic" in the adjective sense
1. flinty, flint, granitic, obdurate, stony
showing unfeeling resistance to tender feelings
"his flinty gaze"
"the child's misery would move even the most obdurate heart"
2. granitic, granitelike, rocklike, stony
hard as granite
"a granitic fist"
Source: WordNet® (An amazing lexical database of English)
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