transcription, транскрипция: [ ʌndə(r)kʌvə(r) ]
Undercover work involves secretly obtaining information for the government or the police.
...an undercover operation designed to catch drug smugglers.
...undercover reporters.
ADJ : usu ADJ n
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Undercover is also an adverb.
Swanson persuaded Hubley to work undercover to capture the killer.
ADV : ADV after v