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