incompatible

not compatible; "incompatible personalities"; "incompatible colors"

used especially of drugs or muscles that counteract or neutralize each other's effect

not suitable to your tastes or needs; "the uncongenial roommates were always fighting"; "the task was uncongenial to one sensitive to rebuffs"

incapable of being used with or connected to other devices or components without modification

of words so related that one contrasts with the other; "`rich' and `hard-up' are contrastive terms"

not easy to combine harmoniously

not compatible with other facts

not in keeping with what is correct or proper; "completely inappropriate behavior"

used especially of solids or solutions; incapable of blending into a stable homogeneous mixture