ἀκραγής
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
English (LSJ)
ές, (κράζω)
A not barking, ἀκραγεῖς κύνες, of gryphons, A. Pr.803. Hsch. expl. ἀκραγές by δυσχερές, σκληρόν, ὀξύχολον, cf. ἄκραγγες (leg. ἀκραγές) · ἀκρόχολον AB369.