велеречивый

From LSJ

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

Source

Russian > Greek

ὑψήγορος, μεγαλόφωνος, σεμνολόγος