γνόφος
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)
later form for δνόφος,
A darkness, Chron.Lind. D.28, Ep.Hebr.12.18, D.Chr. 34.37(pl.), Luc.Peregr.43: pl., storm-clouds, Arist.Mu.391b12.