flinty (
http://definr.com/flinty)
adj 1: showing unfeeling resistance to tender feelings; "the
child's misery would move even the most obdurate
heart" [syn:
obdurate,
stony]
2: having austere inflexibility; "a flinty manner"; "granitic
morality"; "his unyielding mouth and glassy eyes"-
Marchette Chute [syn:
granitic,
unyielding]