| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | devilish, wicked |
| Synonyms: | arch, artful, bad, bothersome, damaging, dangerous, deleterious, destructive, detrimental, dickens, evil, exasperating, foxy*, frolicsome, harmful, hazardous, holy terror, hurtful, ill, ill-behaved, impish, injurious, insidious, irksome, malicious, malignant, misbehaving, naughty, nocuous, perilous, pernicious, playful, precarious, puckish, rascal, rascally, risky, rude, sinful, sly, spiteful, sportive, teasing, tricky, troublesome, vexatious, vexing, vicious, wayward |
| Antonyms: | behaved, good, nice, obedient |
| Main Entry: | shifty |
| Part of Speech: | adjective |
| Definition: | deceitful, untrustworthy |
| Synonyms: | cagey, collusive, conniving, contriving, crafty, crooked, cunning, devious, dishonest, dodging, duplicitous, elusive, equivocating, evasive, fly-by-night, foxy, fraudulent, furtive, insidious, lying, mendacious, prevaricative, prevaricatory, roguish, scheming, shady, shrewd, shuffling, slick, slimy*, slippery, sly, sneaky, treacherous, tricky, underhand, unhonest, unprincipled, untruthful, wily |
| Antonyms: | forthright, frank, honest, trustworthy |
| Main Entry: | sly |
| Part of Speech: | adjective |
| Definition: | clever, devious |
| Synonyms: | arch, artful, astute, bluffing, cagey, calculating, canny, captious, conniving, covert, crafty, crooked, cunning, deceitful, deceptive, delusive, designing, dishonest, dishonorable, dissembling, double-dealing, elusive, foxy, furtive, guileful, illusory, impish, ingenious, insidious, intriguing, mean, mischievous, plotting, roguish, scheming, secret, sharp, shifty, shrewd, slick, smart, smooth, sneaking, stealthy, subtle, traitorous, treacherous, tricky, underhand, unscrupulous, wily |
| Antonyms: | honest, open, simple, straight, straightforward, unclever |
| Main Entry: | snaky |
| Part of Speech: | adjective |
| Definition: | devious, sly |
| Synonyms: | crafty, insidious, lurking, perfidious, slinking, sneaky, subtle, treacherous, venomous, vipery, virulent |
| Antonyms: | forthright, honest, upfront |
| Main Entry: | subtle |
| Part of Speech: | adjective |
| Definition: | clever, cunning |
| Synonyms: | analytic, analytical, artful, astute, complex, crafty, deep, designing, detailed, devious, dexterous, exacting, foxy, guileful, insidious, intriguing, keen, penetrating, perceptive, precise, ratiocinative, scheming, shrewd, skillful, sly, wily |
| Antonyms: | forthright, honest, open |
| Main Entry: | treacherous |
| Part of Speech: | adjective |
| Definition: | dishonest, disloyal |
| Synonyms: | betraying, catchy, deceitful, deceptive, double-crossing, double-dealing, duplicitous, faithless, false, false-hearted, fly-by-night, insidious, misleading, perfidious, recreant, shifty, slick*, slippery*, snake in the grass, traitorous, treasonable, tricky, two-faced, two-timing, undependable, unfaithful, unloyal, unreliable, untrue, untrustworthy |
| Antonyms: | forthright, honest, loyal, true |
| Main Entry: | tricky |
| Part of Speech: | adjective |
| Definition: | deceptive, sly |
| Synonyms: | artful, astute, cagey, catchy, clever, crafty, cunning, deceitful, deep, delusive, delusory, devious, dishonest, foxy, greasy, guileful, insidious, intelligent, keen, misleading, scheming, shady, sharp, shifty, shrewd, slick*, slippery*, smooth, streetwise, subtle, treacherous, wily, witted, wry |
| Antonyms: | aboveboard, frank, honest |
| 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: | wily |
| Part of Speech: | adjective |
| Definition: | crafty, clever |
| Synonyms: | arch, artful, astute, cagey, crazy like a fox, crooked, cunning, deceitful, deceptive, deep, designing, foxy, greasy, guileful, insidious, intriguing, knowing, sagacious, scheming, sharp, shifty, shrewd, slick*, slippery*, sly, smooth, sneaky, streetwise, tricky, underhanded |