τεφρόω
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)
A burn to ashes, Lyc.227; πόλεις 2 Ep.Pet.2.6:—Med., Nic.Al.534:—Pass., to be burnt to ashes, Thphr. Ign.20, AP5.187 (Leon.); to be covered with ashes, D.C.66.21.
German (Pape)
[Seite 1102] aschgrau machen, zu Asche machen, einäschern; Nic. Al. 534; Lycophr. 227; D. C. 66, 21; vgl. B. A. 65.