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double agent

double agent

18 4.9
A spy who secretly works for two opposing sides while pretending to help one and giving secrets to the other
  • noun
  • /ˈdʌbəl ˈeɪdʒənt/
translation icon : agente doble
  • They realized that she had been acting as a double agent, providing secrets to both the enemy and her own country.

And instead of going to, first of all, they had been well informed that by a double agent that the Russians were planning something.

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Examples

Synonyms

mole
vsdouble agent
82 8.2

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

operates by pretending to work for one side while serving another
collaborator
vsdouble agent
  • Offensive
18 8.1

A person who helps an enemy that occupies their country during a war

acts covertly to feed information while claiming to work for one side
turncoat
vsdouble agent
  • Offensive
13 8.2

A person who leaves their group to join the opposite side

betrays by secret service to an enemy while still appearing loyal
double-crosser
vsdouble agent
  • Offensive
2 6.8

A person who pretends to be loyal but betrays someone

works by pretending to serve one side while secretly helping the other
fifth columnist
vsdouble agent
1 9.9

A person who secretly helps an enemy inside their country

does similar spying but usually between rival organizations or nations
double-dealer
vsdouble agent
  • Offensive
1 8.5

A person who pretends to be a friend but secretly works against others

focuses on secret spying for another side rather than general hypocrisy

How Hidden

mole
82 8.2
double agent
18 4.9
plant
68 9.1
informant
165 5.6
agent
  • Formal
2.8

Surface Forms

double agent singular
double agents plural

Morphology

double + agent

The meaning is directly compositional: 'double' (twofold) modifies 'agent' (a person acting on behalf of others), so a 'double agent' is readily understood as an agent serving two sides or pretending to work for one while actually working for another. This adjective+noun pattern is cross-linguistically common and follows normal English composition, so a B1 learner who knows both words would normally infer the intended meaning.

Etymology

Double agent paints a clear picture: an agent living a double life, acting like they belong to one side while secretly helping another. That's why it means 'a spy who works for two sides'.