incompatible

adjective

1. not compatible"incompatible personalities"
2. used especially of drugs or muscles that counteract or neutralize each other's effect
3. not suitable to your tastes or needs"the uncongenial roommates were always fighting"
4. incapable of being used with or connected to other devices or components without modification
5. of words so related that one contrasts with the other"‘rich’ and ‘hard-up’ are contrastive terms"
6. not easy to combine harmoniously
7. not compatible with other facts
8. not in keeping with what is correct or proper"completely inappropriate behavior"
9. used especially of solids or solutions; incapable of blending into a stable homogeneous mixture