τερθρεύομαι

A. use extreme subtlety, Arist. Top. 156b38, Plu. 2.43a, Gal. UP 6.12, dub. cj. by Bgk. in Ar. Fr. 198.9, cf. Pherecr. 18 (dub.); τ. περί τινος D. 61.15.