inimical \ih-NIM-ih-kul\, adjective:
1. Having the disposition or temper of an enemy; unfriendly; unfavorable.2. Opposed in tendency, influence, or effects; antagonistic; adverse.
Many people in my family are inimical to strangers.
This cold, windy weather is inimical to my immune system. Hopefully my immune system is far more inimical than the weather.
~Zoo