ἡ κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person
subs.
P. and V. κτύπος, ὁ (Thuc. and Plat. but rare P.) (also Ar.), V. βρόμος, ὁ; see noise. v. intrans. P. and V. κτυπεῖν (Plat. but rare P.) (also Ar.), V. βρέμειν (also Ar. in mid.); see resound.