A.hard to catch or take, “ἄγρα” Pl.Ly.206a (Comp.); of birds and fish, Arist.HA615a17,599b25; “ἐρύματα” Ph.2.133.
2. hard to conquer, “ἀρχά” A.Pr.167 (lyr.); “πάθος” Luc.Abd.18 (Sup.); immune, “τοῖς ἔξωθεν αἰτίοις δ. σῶμα” Gal.4.742; “πρὸς νόσους” Sor.1.32 (Comp.): c. gen., δ. κακῶν beyond reach of ills, S. OC1723(lyr.).
3. hard to comprehend, Pl.Ti.51a (Sup.).