FLINTY
flinty, flint, granitic, obdurate, stony
(adjective) showing unfeeling resistance to tender feelings; “his flinty gaze”; “the child’s misery would move even the most obdurate heart”
flinty
(adjective) containing flint
Source: WordNet® 3.1
Etymology
Adjective
flinty (comparative flintier or more flinty, superlative flintiest or most flinty)
Resembling or containing flint.
(geology) Siliceous (including basanite).
Showing a lack of emotion.
Having a taste characteristic of certain white wines, especially Chablis, supposed to evoke the sensation of flint striking steel.
Source: Wiktionary
Flint"y, a. [Compar. Flintier; superl. Flintiest.]
Definition: Consisting of, composed of, abounding in, or resembling, flint;
as, a flinty rock; flinty ground; a flinty heart. Flinty rockFlinty
state, a siliceous slate; -- basanite is here included. See Basanite.
Source: Webster’s Unabridged Dictionary 1913 Edition