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be undercover
adjective
Performed or happening in secret.
Exact(37)
MPs can no longer talk to their own constituents without suspecting they may be undercover reporters.
At the request of the N.F.L. and the 49ers, more officers than usual will be undercover, some wearing Giants garb and sitting in the stands.
The fan theory: R2-D2 and Chewbacca have secretly been rebel agents all along – with the former forgoing a memory wipe to be undercover and the latter secretly being Yoda's eyes and ears.
Only twice was she truly frightened by potential predators: once by some regular guys pretending to be undercover cops ("like the guys on '21 Jump Street,'" they told her) and once by undercover cops pretending they were regular guys.
"It needs to be undercover, everyone agrees.
Unfortunately for her (and the prisoners), her co-conspirators turned out to be undercover cops.
Similar(22)
He looks like he's undercover".
And my character is undercover.
They are undercover like crazy.
Unless Bourne is undercover, of course.
They say the soldiers were undercover agents.
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CEO of Professional Science Editing for Scientists @ prosciediting.com