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infiltrator

infiltrator

12 8.2
A person who secretly enters a place to get secret information or cause harm
  • noun
  • /ˈɪnfɪltreɪtər/
translation icon : infiltrado
  • The Afghan army and police are full of Taliban infiltrators waiting for their chance.

And when they're the ones saying that something's gone wrong, I mean, I am a secret leftist infiltrator, but I'm an honest one.

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Examples

  • The police are on high alert for any potential infiltrators trying to gather intelligence on the operation.

  • Any infiltrators at the shopping mall?

  • We believe the infiltrator has passed along sensitive information.

  • You will stay and search the theatre for other infiltrators.

  • Part of the session was caught on video before the infiltrators were escorted out.

    Blog text (2)
  • Colonel Sharp, we have an inbound unidentified infiltrator, 10 miles out.

  • In World War II, infiltrators and downed pilots had to be able to find their way behind enemy lines.

    Academic text (2003)
  • The Saudi government declared its intervention a success, stating that its territory was now clear of "infiltrators."

    Academic text (2012)
  • The target country knows that the infiltrator is a foreigner but is persuaded he is a friendly, sympathetic foreigner.

    Fiction book (1994)
  • Indian security forces regularly apprehend and kill would-be infiltrators.

    Academic text (2006)

Synonyms

spy
vsinfiltrator
623 2.9

A person who secretly collects information for a government or company

enters secretly with focus on gathering information or causing damage
intruder
vsinfiltrator
240 3.9

A person who enters a place without permission to steal or harm people

enters covertly with the aim of getting secrets or causing harm inside
mole
vsinfiltrator
82 8.2

A person who secretly works inside an organization to pass information to an enemy

enters covertly, often briefly to get information or cause harm
secret agent
vsinfiltrator
27 3.4

A person who gathers hidden information for a government about enemies

enters covertly, often to get information or cause harm rather than formal employment
undercover agent
vsinfiltrator
18 4.1

A person who works secretly for the police to gather information while hiding who they are

enters covertly without necessarily having a false identity
intelligence agent
vsinfiltrator
  • Specialized
13 3.0

A person who secretly works for a government to get information about the country's safety

enters covertly and can target areas beyond national security concerns
foreign agent
vsinfiltrator
2 7.5

A person who secretly gathers and gives information to another country

enters covertly without necessarily acting for a foreign government
fifth columnist
vsinfiltrator
1 9.9

A person who secretly helps an enemy inside their country

enters covertly mainly to help an enemy rather than just gather information
espionage agent
vsinfiltrator
  • Specialized
1 5.8

A person who secretly gets information for another country or company

enters covertly to get information or cause harm in any setting
agent-in-place
vsinfiltrator
  • Jargon
8.9

A person who works secretly inside another group to get information

enters covertly, usually to obtain secrets or to do harm

Antonyms

252 2.8

A person who protects someone or something from harm

How Covert

mole
82 8.2
spy
623 2.9
infiltrator
12 8.2
trespasser
25 4.9

Surface Forms

infiltrator singular
infiltrators plural

Morphology

infiltrator = infiltrate (semi-transparent) = in + filtr + ate + or

The noun means a person who infiltrates, which is a straightforward agentive use of the suffix '-or'.

Etymology

Infiltrator comes from in- 'into' and the same root as the common word filter, which means 'to pass slowly through' small gaps. So an infiltrator is someone who quietly 'filters into' a place or group to get secret information or cause harm.