δυσλείωτος
From LSJ
διὸ καὶ μεταλάττουσι τὴν φυσικὴν χρῆσιν εἰς τὴν παρὰ φύσιν αἱ δοκοῦσαι παρθένοι τῶν εἰδώλων → therefore those professing to be virgins of the idols even change the natural use into the unnatural (Origen, commentary on Romans 1:26)
English (LSJ)
ον, = δυσλέαντος (hard to pound, hard to bray), opp. εὐλείωτος, Asclep. ap. Gal. 13.677.
Spanish (DGE)
-ον
difícil de machacar de plantas en preparados médicos, Asclep. en Gal.13.677, cf. Aët.8.70 (p.531).