verb (v)

• provoke the hostility of(verb.emotion)

  Example:
  Don't antagonize your boss.
  

  Synonym:
  antagonise
  

  source: wordnet30
• act in opposition to(verb.social)

  Synonym:
  antagonise, counteract
  

  source: wordnet30
• To contend with; to oppose actively; to counteract.(verb)

  source: webster1913
• To act in opposition.(verb)

  source: webster1913