This rare adjective appears only in Psalm 124:5, where it describes waters as 'raging' or 'insolent.' The imagery portrays enemies as a turbulent flood threatening to overwhelm God's people. The Spanish 'impetuosas' (impetuous) and the concept of moral insolence converge here—the waters are not merely violent but arrogantly so, embodying the hubris of those who oppose the faithful. This single occurrence captures both physical violence and moral defiance.