Unhealthy (adjective)

Not conducive to good health; harmful to health; unsanitary or unclean.

Origin:

Late 16th century; earliest use found in edmund spenser (c1552–1599), poet. from un- + healthy.

Examples:

1. Eating too much junk food can lead to an unhealthy diet.
2. The unhealthy living conditions in the slums contribute to the spread of diseases.
3. The air quality in the city is unhealthy for residents.
4. The unhealthy obsession with perfection can lead to severe stress and anxiety.
5. The unhealthy work environment took a toll on her physical and mental health.