incompatible

Synonyms: adverse antipathetic antipodal antithetical clashing conflicting contrary counter disagreeing discordant discrepant disparate factious inadmissible inappropriate incoherent inconformable incongruous inconsistent inconsonant inconstant irreconcilable jarring marching to a different drummer mismatched night and day offbeat opposed opposite poles apart unadapted uncongenial unsuitable unsuited warring whale of difference

Antonyms: compatible consonant harmonious loving suited well-matched