adj. not compatible; "incompatible personalities"; "incompatible colors"

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

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

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

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

adj. not compatible with other facts

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

adj. not easy to combine harmoniously

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