ἀποφθεγκτήριον
From LSJ
Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.
English (LSJ)
τό,
A an utterance, Man.4.550.
Greek (Liddell-Scott)
ἀποφθεγκτήριον: τὸ, ἔκφρασις, ἐκφώνησις, Μανέθ. 4. 550.