σκιῤῥός
From LSJ
τῶν δ᾽ ὀρθουμένων σῴζει τὰ πολλὰ σώμαθ᾽ ἡ πειθαρχία → But of those who make it through, following orders is what saves most of their lives (Sophocles, Antigone 675f.)
German (Pape)
[Seite 900] hart, fest, abgehärtet, verhärtet; übertr., σκιῤῥοὶ θεοί, harte, unbarmherzige Götter, Schaef. Long. p. 364.