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