Quisling
Quisling (/ˈkwɪzlɪŋ/, Norwegian: [ˈkvɪ̂slɪŋ]) is a term used in Scandinavian languages and in English to mean a citizen or politician of an occupied country who collaborates with an enemy occupying force; it may also be used more generally as a synonym for traitor or collaborator. The word originates from the surname of the Norwegian war-time leader Vidkun Quisling (1887–1945), who headed a domestic Nazi collaborationist regime during World War II.