Infiltrate
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Covert Actions
The word is often used in contexts involving spying or covert operations. She was tasked to infiltrate the corporation to gather confidential information.
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Negative Connotation
'Infiltrate' usually has a negative feel, suggesting stealth for malicious purposes. Activists were accused of trying to infiltrate the political party to create discord.
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Secrecy Implied
Implies entering a place or group without attracting attention, often for secret information. The journalist infiltrated the cult to expose its practices.