unhealthy
Definitions
Harmful to one's physical or mental well-being.
Not in a state of good health; ill or sickly.
Suggestive of or resulting from poor health or lack of moral well-being.
Examples
Eating too much processed food is considered unhealthy for your heart.
Staying up late every night is an unhealthy habit that can affect your productivity.
The doctor warned him that his sedentary lifestyle was becoming increasingly unhealthy.