ἡ κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person
inf. ao.2 Moy. au sens Pass. de πέρθω.
πέρθαι: эп. inf. aor. 2 med.-pass. к πέρθω.
πέρθαι inf. aor. med. van πέρθω.