1. the state or quality of being harmful to one’s physical health
2. the quality of being morally or mentally harmful or unwholesome

Examples

• The unhealthiness of fast food is well documented by nutritionists.
• She was concerned about the unhealthiness of her sedentary lifestyle.
• The doctor warned about the unhealthiness of smoking cigarettes.
• The unhealthiness of the work environment affected employee morale.
• Parents worry about the unhealthiness of too much screen time for children.
• The unhealthiness of the relationship became apparent over time.