FLINTIEST
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
Adjective
flintiest
superlative form of flinty: most flinty
Source: Wiktionary
FLINTY
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