undercover
1 of 2adjective/ˌʌndɚˈkʌvɚ/
1
working or conducted secretly under the supervision of a law enforcement agency to gather information or catch criminals
C1- The undercover agent infiltrated the criminal organization to gather intelligence.
- They operated under an undercover identity to protect their true identity from the suspects.
- The undercover operation uncovered illegal activities within the company.
- He worked as an undercover investigator, posing as a regular customer to catch shoplifters.
- The undercover journalist exposed corruption in the local government through their investigative reporting.