στρυφνότης
From LSJ
εἰ πλείονα δ' εἰδείης Σισύφου → if you were more intelligent than Sisyphus
English (LSJ)
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.