ἀπρόσιτος
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)
ον,
A unapproachable, inaccessible, ὄρη Plb.3.49.7, cf. Str. 1.3.18; φῶς 1 Ep.Ti.6.16; of persons, Cic.Att.5.20.6, cf. Plu.2.68e; καταφυγή D.S.19.96: metaph., λόγοις ἀ. παρρησία Plu.Alc.4; δύναμις τοῦ λόγου Luc.Dem.Enc.32. Adv. -τως Plu.2.45f.