infiltrate

1. To surreptitiously penetrate, enter or gain access to. · The spy infiltrated the high-tech company and stole many secrets.
2. To cause to penetrate in this way. (transitive) · The agency infiltrated several spies into the company.
3. To pass through something by filtration.
4. To cause (a liquid) to pass through something by filtration. (transitive)
5. To invade or penetrate a tissue or organ. · High-grade tumors often infiltrate surrounding structures.· In certain conditions, immune cells may infiltrate into the cerebrospinal fluid.
6. To send (soldiers, spies, etc.) through gaps in the enemy line. (transitive)
7. To move from a vein, remaining in the body. (intransitive)

He/she/it infiltrates · الماضي infiltrated · التصريف الثالث (اسم المفعول) infiltrated · صيغة -ing infiltrating