战争期间，他因向敌人提供情报而被同胞们称为卖国贼。

During the war, he was called a quisling by his countrymen for providing intelligence to the enemy.

quisling 来自挪威法西斯领导人Vidkun Quisling的姓氏，他在二战期间与纳粹德国合作。这个词后来成为"卖国贼"的代名词，特指那些与占领者合作的叛徒。