UNDERCOVER
Meaning of UNDERCOVER in English
adjective
Synonyms: secret 1, clandestine, covert, furtive, hole-and-corner, hugger-mugger, hush-hush, sub-rosa, ||underneath, under-the-table
Merriam Webster.
Collegiate thesaurus English vocabulary.
Английский энциклопедический словарь тезаурус.
2003