ἀκτέον
From LSJ
μήτε δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement until you have heard a speech on both sides
English (LSJ)
(ἄγω)
A one must lead, Pl.R.467e, etc.; one must treat, τινὰς τρυφερώτερον Sor.2.9; one must bring, εἰς ὑπόμνησιν Apollon.Cit. 3. 2 εἰρήνην ἀκτέον one must keep peace, And.3.40, D.8.5. II one must go, march, X.HG6.4.5. III Adj., ἀκτέος, α, ον, to be drawn, γραμμαί Gal.16.406; to be led away, ἐπὶ τὸ κολασθῆναι D.23 Arg.2.3.