προκόπτειν

From LSJ

μήτε δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement until you have heard a speech on both sides

Source

Greek > English (Woodhouse Verbs Reversed)

(see also προκόπτω): advance, improve, gain ground, make headway

Lexicon Thucydideum

promovere, to move forward, advance, 4.60.2, 7.56.3.