| Main Entry: | surreptitious |
| Part of Speech: | adjective |
| Definition: | sneaky, secret |
Synonyms: |
clandestine, covert, fraudulent, furtive, hidden, hole-and-corner, hush-hush, on the QT, on the sly, private, skulking, slinking, sly, sneaking, stealthy, sub-rosa, unauthorized, under wraps, under-the-table, undercover, underhand, veiled |
Antonyms: |
aboveboard, authorized, honest, open |
| Main Entry: | undercover |
| Part of Speech: | adjective |
| Definition: | 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, under wraps, underground, underhand, underneath |
Antonyms: |
known, open, public |