τὸ δανείζεσθαι τῆς ἐσχάτης ἀφροσύνης καὶ μαλακίας ἐστίν → being in debt is a mark of extreme folly and moral weakness (Plutarch, On Avoiding Debt 829F3)
P. and V. ἄφωνος, V. ἄφθεγκτος, ἄφθογγος, ἄναυδος, ἀφώνητος, ἀπόφθεγκτος.
I am struck dumb: Ar. and V. ἀφασία μ' ἔχει.
