counter-espionage
noun/ˌkaʊntər ˈespiənɑːʒ/
/ˌkaʊntər ˈespiənɑːʒ/
[uncountable]- secret action taken by a country to prevent an enemy country from finding out its secrets
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counter-espionage
Definition of counter-espionage noun from the Oxford Advanced Learner's Dictionary