counterespionage
Counterespionage (noun) means the work of blocking or turning to advantage the spying carried out by another country or an enemy. Example: “The agency's counterespionage branch spent years hunting for a mole.”
How to use counterespionage
Learner’s notesIn plain EnglishCounterespionage is the business of catching and countering enemy spies.
It is a formal term, mostly found in writing about security and intelligence.
It is uncountable, so say 'counterespionage is' rather than 'a counterespionage'.
Trace the full origin ↓Fill the gap
Can you complete this real example?
The agency's _____ branch spent years hunting for a mole.
Etymology
The word is built from the prefix counter- and the word espionage.