Where does “counterintelligence” come from?
Counterintelligence comes from Old French contre and Old French intelligence, which derive from Latin contra and Latin intelligentia respectively, with intelligentia from Latin rota ultimately tracing to Proto-Indo-European Hróth₂-eh₂ through ret-.
counterintelligence (English): counterespionage
Ancestry of “counterintelligence”, step by step
Words derived from “counterintelligence”