ἀκαταπράϋντος
From LSJ
ὑπὸ δὲ τῆς φιλαυτίας παρηγμένοι ἄλογα φασὶν τὰ ζῷα ἐφεξῆς τὰ ἄλλα σύμπαντα → it is self-love which leads them to say that all the other animals without exception are non-rational
English (LSJ)
ον,
A unappeasable, Sch. S.Tr.999, Gloss.
Greek (Liddell-Scott)
ἀκαταπράϋντος: -ον, ὃν δὲν δύναταί τις νὰ καταπρΰνῃ, Σχόλ. εἰς Σοφ. Τρ. 999.