μασταρύζω
From LSJ
Ὁ μηδὲν εἰδὼς οὐδὲν ἐξαμαρτάνει → Quicumque nihil (nil) scit, ille vir peccat nihil → Ein Mann, der ohne Wissen ist, macht auch nichts falsch
English (LSJ)
A mumble, like one with his mouth full, of an old man, Ar.Ach.689; cf. μασταρίζειν· μαστιχᾶσθαι, καὶ τρέμειν, κτλ., Hsch.:— also μαστηρύζειν· τὸ κακῶς μασᾶσθαι (Cyren.), Phot.