Injurious (adjective)

1. Harmful, causing injury or damage.
2. Likely to cause injury or harm.

Origin:

From latin injuriōsus (harmful, detrimental), from injuria (injury, harm).

Examples:

1. The substance was found to be injurious to human health.
2. The behavior was injurious to the relationship.
3. The conditions were injurious to the plants.
4. The environment was injurious to the animals.
5. The pollution was injurious to the health of the citizens.