infiltrator 1
noundomain: person
Princeton WordNet [ver.3.1]
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EnglishDefinition
someone who takes up a position surreptitiously for the purpose of espionage
Hypernym
spy 1
noun
(military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
EnglishDerivationally related form
infiltrate 2
verb
enter a group or organization in order to spy on the members
