δίκην λαγχάνειν

From LSJ

τὸ ζῷον τοῦτο οὐ μονῆρες καὶ αὐθέκαστον, ἀλλὰ κοινωνικὸν καὶ πολιτικόν → this animal is not solitary and self-sufficient, but social and political

Source

Greek > English (Woodhouse)

get leave to introduce a suit