undercover

1. Performed or happening in secret.

   heimlich

2. Employed or engaged in spying or secret investigation.

   verdeckt

1. Tom pretended to be an undercover policeman.

   deTom tat so, als wäre er ein verdeckter Polizist. — Pfirsichbaeumchen

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2. Tom has been asked to go undercover.

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3. I think Tom is an undercover cop.

   deTom ist verdeckter Ermittler. — Pfirsichbaeumchen

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4. I can't believe Tom was an undercover cop.

   ruЯ не могу поверить, что Том был полицейским под прикрытием. — venticello

   deIch kann nicht glauben, dass Tom ein verdeckter Polizist war. — Pfirsichbaeumchen

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5. Tom told me that he was doing some undercover work.

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regular