infiltrate
infiltrate verb [ T ] uk/ˈɪnfɪltreɪt/ usto secretly join a group or organization so that you can learn more about them
проникать, внедряться
A journalist managed to infiltrate the gang of drug dealers. infiltration noun [ C,U ] uk/ˌɪnfɪlˈtreɪʃən/ us
проникновение, внедрение
infiltrator noun [ C ]
шпион