collaborationism
/kəˌlæbəˈreɪʃənɪzəm/the advocacy or practice of collaboration with an enemy.act of cooperating traitorously with an enemy that is occupying your country
noun [专属名词] 卖国，通敌
Collaborationism is often used to describe the cooperation of civilians with the Axis Powers during World War II. “通敌合作”一词常被用来形容二战期间平民与轴心国的合作。
