Inimical (adjective)

1. Harmful, detrimental, or unfriendly.
2. Likely to cause harm or damage.

Origin:

From latin inimicus (hostile, unfriendly), from in- (not) + amicus (friend).

Examples:

1. The new policy was inimical to the interests of the workers.
2. The harsh conditions were inimical to the health of the soldiers.
3. The cold weather was inimical to the growth of the plants.
4. The inimical attitude of the boss made the work environment unbearable.
5. The inimical effects of the pollution on the health of the citizens were well known.