antagonistic

Adjective

• incapable of harmonious association

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

• arousing animosity or hostility
  • his antagonistic brusqueness
    
  • Europe was antagonistic to the Unites States
    

• characterized by antagonism or antipathy
  • slaves antagonistic to their masters
    
  • antipathetic factions within the party
    

• indicating opposition or resistance

Related words

• Synonyms: 
  incompatible , antipathetic , antipathetical , counter
• Antonyms: 
  synergistic , interactive , conciliatory , conciliative