Akademik

flinty
adjective
1. containing flint
Pertains to noun: ↑flint
Derivationally related forms: ↑flint
2. showing unfeeling resistance to tender feelings
-

his flinty gaze

-

the child's misery would move even the most obdurate heart

Syn: ↑flint, ↑granitic, ↑obdurate, ↑stony
Similar to: ↑hardhearted, ↑heartless
Derivationally related forms: ↑stone (for: ↑stony), ↑granite (for: ↑granitic)

Useful english dictionary. 2012.