στρυφνότης

ητος, ἡ
A. rough, harsh taste, sourness, Arist. Cat. 9a30, Pr. 864b5: pl., Diocl.Fr. 138, Gal. 6.465.
II. metaph., harshness of style, prob. in D.H. Dem. 34 (στριφνότης (q.v.) codd.); περὶ τὸ ἦθος Plu. Mar. 2.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project