卧底

[wò dĭ]

Undercover usually refers to a spy or someone working undercover in criminal organizations or enemy camps. It's often used metaphorically to describe people with hidden roles or intentions.

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Relation Nicknames

眼線 [yăn xiàn]
Informant or Spy usually refers to someone acting as a secret source providing information Could ...
潜罪犯 [qián zuì fàn]
Meaning undercover criminal it refers to someone who hides their illegal activities blending into ...