ἀπὸ τῶν καρπῶν αὐτῶν ἐπιγνώσεσθε αὐτούς → ye shall know them by their fruits, by their fruits ye shall know them, by their fruits you shall know them, you will know them by their fruit
(=προχωρῶ στίς ἄκρες τῶν ποδιῶν μου). Παρασύνθετο ἀπό τό ἀκροβάτης (ἄκρος + βαίνω). Δές γιά περισσότερα παράγωγα στό βαίνω.