διακώλυσις
From LSJ
τὸ δὲ ποιεῖν ἄνευ νοῦ ἃ δοκεῖ καὶ σὺ ὁμολογεῖς κακὸν εἶναι: ἢ οὔ → but doing what one thinks fit without intelligence is—as you yourself admit, do you not?—an evil
English (LSJ)
εως, ἡ,
A hindering, preventing, αἱ τῶν ἀναιρέσεων δ. Id.R.469e; ἀπὸ προαιρέσεων Arist.Rh.Al.1421b22.
German (Pape)
[Seite 585] ἡ, Verhinderung, Plat. Rep. V, 469 e; – Sp.