fifth columnist

A member of a clandestine group of people who work subversively within a group, organization, or country in order to betray it to an allied outside force. In the US during the Cold War, there was constant fear and suspicion of people supposedly working as fifth columnists to spread the influence of communism from within.

Common Names:

Name	Pronounced	Usage
Kire	-	Macedonian
Dalibor	-	Czech, Slovak, Croatian, Serbian, Slovene, Medieval Slavic
Flaviano	flah-VYAH-no	Italian
Belshatzzar	-	Biblical Hebrew
Damodara	-	Hinduism
Teague	-	Irish