ἀπολιθόω
From LSJ
κακὸς μὲν γὰρ ἑκὼν οὐδείς → no one is voluntarily wicked, no one is voluntarily bad
English (LSJ)
A turn into stone, petrify, Arist.Pr.937a17, cf. Hellanic. 191 J., Pherecyd.77 J.:—Pass., ἀ. ὑπὸ τοῦ ἡλίου Thphr.HP4.7.2; become stone, Arist.Pr.937a14, Mir.838a14, Str.5.4.13, Palaeph.31; become hard, PHolm.4.38.
German (Pape)
[Seite 312] versteinern, Arist. probl. 24, 11; Theophr.