1. plural of harmfulness; the quality or state of being harmful or capable of causing damage or injury
Usage: typically used in formal or academic contexts; abstract noun referring to multiple instances or aspects of harm

Examples

• The harmfulnesses of smoking are well documented by medical research.
• Scientists debate the relative harmfulnesses of different pesticides.
• The report examined the harmfulnesses of various industrial pollutants.
• Parents worry about the harmfulnesses of excessive screen time for children.
• The study compared the harmfulnesses of different types of radiation exposure.
• Regulatory agencies assess the harmfulnesses of new chemicals before approval.