1. the quality or state of being hazardous; the degree to which something involves risk or danger
Usage: abstract noun formed from the adjective 'hazardous'

Examples

• The hazardousness of the construction site required all workers to wear protective gear.
• Engineers assessed the hazardousness of the bridge before allowing traffic to cross it.
• The hazardousness of deep-sea diving cannot be overstated.
• Regulations exist to reduce the hazardousness of industrial chemicals in the workplace.
• Despite the hazardousness of the mountain climb, experienced hikers attempted the route.
• The hazardousness of texting while driving has been well documented by safety researchers.