δύσφθεγκτος
From LSJ
οὕτω τι βαθὺ καὶ μυστηριῶδες ἡ σιγὴ καὶ νηφάλιον, ἡ δὲ μέθη λάλον → silence is something profound and mysterious and sober, but drunkenness chatters
English (LSJ)
δύσφθεγκτον, unfit to be uttered, Poll.3.129, 5.123.
Spanish (DGE)
-ον difícil de pronunciar Poll.3.129, 5.123, 9.132.
German (Pape)
[Seite 690] schwer auszusprechen, Poll. 3, 129.