adj
1. not compatible
e.g. incompatible personalities
incompatible colors
2. incapable of being used with or connected to other devices or components without modification
3. used especially of solids or solutions
incapable of blending into a stable homogeneous mixture
4. not suitable to your tastes or needs
e.g. the uncongenial roommates were always fighting
the task was uncongenial to one sensitive to rebuffs
Synonym: uncongenial
5. not in keeping with what is correct or proper
e.g. completely inappropriate behavior
Synonym: inappropriateout or keeping(p)unfitting
6. not compatible with other facts
Synonym: discrepant
7. used especially of drugs or muscles that counteract or neutralize each other's effect
Synonym: antagonistic
8. not easy to combine harmoniously
Synonym: ill-sortedmismatedunsuited
9. of words so related that one contrasts with the other
e.g. `rich' and `hard-up' are contrastive terms
Synonym: contrastive