collaborator  
noun [ C ] uk/kəˈlæb.ə.reɪ.tər/ us/kəˈlæb.ə.reɪ.t̬ɚ/
  (ENEMY SUPPORTER)      
  disapproving通敌分子,卖国贼 
a person who works with an enemy who has taken control of their country
  wartime collaborators 战争期间的通敌者 
 a Nazi collaborator 与纳粹勾结的人 
   (WORKING WITH)      
 合作者
a person who works together with others for a special purpose
  a new production by Andrew Davies and collaborators 安德鲁‧戴维斯及其合作者推出的一部新作