1. the quality or state of being beneficial; the property of producing good or helpful results
Usage: abstract noun; formal register

Examples

• The beneficialness of regular exercise for heart health is well documented.
• Scientists debate the beneficialness of certain dietary supplements.
• The beneficialness of the new policy became clear within a few months.
• We cannot deny the beneficialness of clean water to public health.
• The beneficialness of this treatment depends on the individual patient's condition.
• Her research focuses on the beneficialness of meditation in reducing stress.