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English definition of “infiltrate”

infiltrate

verb [T]     /ˈɪnfɪltreɪt/
to secretly join a group or organization so that you can learn more about them: A journalist managed to infiltrate the gang of drug dealers .Hiding and disguising
infiltration     /ˌɪnfɪlˈtreɪʃən/ noun [C, U] infiltrator noun [C]
(Definition of infiltrate verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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