This rare term appears only in Isaiah 32, describing morally corrupt individuals who plot wickedness. The word likely derives from a root meaning deception or vileness. Isaiah uses it in parallel with 'fool' (nabal) to characterize those who speak folly and practice ungodliness. The second occurrence (v. 7) employs wordplay, using the term's sound similarity to 'instruments' (kelav) to suggest that the scoundrel's tools are wicked schemes. The context emphasizes both character and deliberate evil action.