[ῥᾳδιουργία] from the same as G4467; recklessness, i.e. (by extension) malignity
Usages throughout the bible
Acts 13:10
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And said, O full of all subtilty and all mischief, G4468thou child of the devil, thou enemy of all righteousness, wilt thou not cease to pervert the right ways of the Lord?