undercover
- adjective (adj)
Meaning: secret, spy
Synonyms:
clandestine
concealed
confidential
covert
creep
furtive
hidden
hole-and-corner
hush-hush
incognito
intelligence
on the qt
private
stealth
stealthy
sub-rosa
surreptitious
underground
underhand
underneath
under wraps
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.