ἀκατήχητος
From LSJ
τούτων γάρ ἑκάτερον κοινῷ ὀνόματι προσαγορεύεται ζῷον, καί ὁ λόγος δέ τῆς οὐσίας ὁ αὐτός → and these are univocally so named, inasmuch as not only the name, but also the definition, is the same in both cases (Aristotle, Categoriae 1a8-10)
English (LSJ)
ον,
A not encompassed by sound, Suid.
Greek (Liddell-Scott)
ἀκατήχητος: -ον, ὁ μὴ ὑπὸ ἤχου περιβαλλόμενος, Σουΐδ. ΙΙ. ὁ μὴ διδαχθεὶς τὰς θεμελιώδεις τῆς πίστεως ἀρχάς, Ἐκκλ.