πονηρία
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)
ἡ,
A bad state or condition, ὀφθαλμῶν Pl. Hp.Mi.374d; ἡ τοῦ σώματος π. Id.R.609c; π. ψυχῆς ibid. II in moral sense, wickedness, vice, knavery, ἡ μωρία . . ἀδελφὴ τῆς π. ἔφυ S.Fr.925, cf. Ar.Th.868, Lys.22.16; εἰς τὴν π. πάλιν τρέπεται turns again to vice, X.Cyr.7.5.75: in pl., knavish tricks, rogueries, D.21.19, Arist.Rh.1389a18. 2 baseness, cowardice, E.Cyc.645, Lys.14.9. 3 with a political connotation, mob-rule, Th.8.47.