Definition of quisle in US English:

quisle

verb

rare
  • no object To act as a quisling; to betray one's country, especially by collaborating with an occupying enemy.

Origin

1940s; earliest use found in The Times. From quisl-, showing (humorous) identification of the ending of quisling as -ing.

Pronunciation

quisle

/ˈkwɪzl/