σιγᾶν ἄμεινον ἢ λαλεῖν ἃ μὴ πρέπει → it's better to keep silence than to say what's not appropriate (Menander)
Μεγακλῆς, -κλέους, ὁ or in Ar. also Μεγακλέης, -κλέους, ὁ.