| Main Entry: | |
| 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: | secretly |
| Part of Speech: | adverb |
| Definition: | in hidden manner |
| Synonyms: | behind closed doors, behind someone's back, by stealth, clandestinely, confidentially, covertly, furtively, hush-hush, in camera, in confidence, in holes and corners, in secret, in strict confidence, insidiously, intimately, obscurely, on the QT, on the quiet, on the sly, personally, privately, privily, quietly, slyly, stealthily, sub rosa, surreptitiously, under the table, underhandedly, unobserved |
| Antonyms: | openly, publicly |
| Main Entry: | underhand |
| Part of Speech: | adjective |
| Definition: | deceitful |
| Synonyms: | clandestine, concealed, crafty, crooked, cunning, deceptive, devious, dirty-dealing, dishonest, dishonorable, double-crossing, duplicitous, fraudulent, furtive, guileful, hush-hush, indirect, insidious, oblique, on the QT, on the quiet, secret, secretive, shady, shifty, slippery*, sly*, sneaking, sneaky, stealthy, sub-rosa, surreptitious, treacherous, tricky, two-faced, two-timing, under wraps, undercover, underhanded, unethical, unfair, unjust, unscrupulous, wily |
| Antonyms: | aboveboard, forthright, frank, honest |
| Main Entry: | lubricious |
| Part of Speech: | adjective |
| Definition: | underhand |
| Synonyms: | clandestine, concealed, crafty, crooked, cunning, deceptive, devious, dirty-dealing, dishonest, dishonorable, disingenuous, double-crossing, duplicitous, fraudulent, furtive, guileful, hush-hush, indirect, insidious, oblique, on the QT, on the quiet, secret, secretive, shady, shifty, slippery*, sly*, sneaking, sneaky, stealthy, sub-rosa, surreptitious, treacherous, tricky, two-faced, two-timing, under wraps, undercover, underhanded, unethical, unfair, unjust, unscrupulous, wily |