ἀκαταπράϋντος
From LSJ
θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → it is grasped only by means of an ignorance superior to intellection, it may be immediately cognised only by means of a non-intellection superior to intellection
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.