| 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: | clandestine |
| Part of Speech: | adjective |
| Definition: | secret, sly |
Synonyms: |
artful, cloak-and-dagger, closet, concealed, covert, foxy, fraudulent, furtive, hidden, hush-hush, illegitimate, illicit, in holes and corners, on the Q. T., on the quiet, private, sneaky, stealthy, surreptitious, under wraps, under-the-counter, undercover, underground, underhand |
Antonyms: |
aboveboard, forthright, open, truthful |
| Main Entry: | covert |
| Part of Speech: | adjective |
| Definition: | clandestine, underhanded |
Synonyms: |
QT, buried, camouflaged, cloaked, concealed, disguised, dissembled, furtive, hidden, hush-hush, incog, incognito, masked, obscured, private, privy, secret, shrouded, stealthy, sub rosa, surreptitious, ulterior, under wraps, under-the-table, undercover, underhand, unsuspected, veiled |
| Notes: | covert (concealed, covered, hidden) is the opposite of overt (apparent, open to view, plain, public) |
Antonyms: |
aboveboard, candid, frank, honest, open, overt, public, unconcealed |
| Main Entry: | devious |
| Part of Speech: | adjective |
| Definition: | dishonest, crafty |
Synonyms: |
artful, calculating, crooked, deceitful, double-dealing, duplicitous, errant, erring, evasive, faking one out, fishy, foxy*, fraudulent, guileful, indirect, insidious, insincere, not straightforward, oblique, obliquitous, playing games, playing politics, put on, roundabout, scheming, shady, shifty, shrewd, sly, sneaking, sneaky, surreptitious, treacherous, tricky, underhanded, wily |
Antonyms: |
artless, frank, honest, open, straightforward, trustworthy, truthful |
| Main Entry: | furtive |
| Part of Speech: | adjective |
| Definition: | sneaky, secretive |
Synonyms: |
artful, calculating, cautious, circumspect, clandestine, cloaked, conspiratorial, covert, crafty*, creepy*, cunning, disguised, elusive, evasive, foxy, guileful, hidden, hush-hush, insidious, masked, scheming, shifty, skulking, slinking, sly, stealthy, sub-rosa, surreptitious, tricky*, under wraps, under-the-table, undercover, underhand, underhanded, wily |
Antonyms: |
aboveboard, forthright, honest, open, truthful |
| Main Entry: | hidden |
| Part of Speech: | adjective |
| Definition: | unseen, secret |
Synonyms: |
QT, abstruse, buried, clandestine, cloaked, close, clouded, concealed, covered, covert, cryptic, dark, disguised, eclipsed, esoteric, hermetic, hermetical, imperceivable, in the dark, indiscernible, invisible, latent, masked, mysterious, mystic, mystical, obscure, occult, out of view, private, recondite, screened, secluded, sequestered, shadowy, shrouded, surreptitious, ulterior, undercover, underground, undetected, undisclosed, unexposed, unknown, unrevealed, veiled, withheld |
Antonyms: |
bare, exhibited, exposed, open, out, seen, showing, uncovered |
| Main Entry: | hush-hush |
| Part of Speech: | adjective |
| Definition: | secret |
Synonyms: |
clandestine, classified, closet, confidential, covert, dark, private, restricted, sub-rosa, surreptitious, under-the-table, undercover |
Antonyms: |
known, public, revealed, told |
| Main Entry: | insidious |
| Part of Speech: | adjective |
| Definition: | sneaky, tricky |
Synonyms: |
Machiavellian, artful, astute, corrupt, crafty, crooked, cunning, dangerous, deceitful, deceptive, deep, designing, dishonest, disingenuous, duplicitous, ensnaring, false, foxy, guileful, intriguing, like a snake in the grass, perfidious, perilous, secret, slick, sly, smooth, snaky, sneaking, stealthy, subtle, surreptitious, treacherous, wily, wormlike |
Antonyms: |
fair, honest, open, sincere |
| Main Entry: | secret |
| Part of Speech: | adjective |
| Definition: | underhand, clandestine |
Synonyms: |
backdoor, backstairs, camouflaged, classified, close, confidential, covert, cryptic, discreet, disguised, dissembled, dissimulated, furtive, hush-hush, in ambush, incognito, inside, restricted, secretive, sly, sneak, sneaky, stealthy, sub-rosa, surreptitious, top secret, unacknowledged, under false pretense, under-the-table, underhanded |
Antonyms: |
aboveboard, known, legal, legitimate, public |
| Main Entry: | sneaky |
| Part of Speech: | adjective |
| Definition: | underhanded, dishonest |
Synonyms: |
base, contemptible, cowardly, deceitful, devious, disingenuous, double-dealing, duplicitous, furtive, guileful, indirect, low, malicious, mean, nasty, recreant, secretive, shifty, slippery, sly, sneaking, snide, stealthy, surreptitious, tricky, underhand, unreliable, unscrupulous, untrustworthy, yellow* |
Antonyms: |
aboveboard, candid, forthright, frank, honest |