counter-espionage

n [U] action taken against an enemy's spying 反间谍行动.

counsel, counselling, counsellor, counsellor (US also counselor), counselor, count, count for, count in, count noun (also `countable noun), count on, count out, count up, countable, countdown, countenance, counter, counter-, counter-attack, counter-attraction, counter-clockwise, counter-insurgency, counter-intelligence, counter-intuitive, counter-irritant, counter-offer, counter-productive, counter-productively, counter-revolution, counter-revolutionary, counter-tenor, counteract, counteraction, counterargument, counterbalance, counterbalancing, counterblast, counterclaim, counterfeit, counterfoil, countermand,