1. the tendency or inclination to be affected by or to do something, especially something undesirable

Examples

• His proneness to injury made him reconsider playing contact sports.
• The region’s proneness to flooding requires careful urban planning.
• Her proneness to worry often kept her awake at night.
• The material’s proneness to cracking limits its usefulness in construction.
• Children show a natural proneness to imitate adult behavior.
• The patient’s proneness to infection required extra precautions.