| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | treacherous |
| Synonyms: | betraying, deceitful, deceptive, double-crossing, double-dealing, faithless, false, insidious, misleading, recreant, shifty, slick*, snake in the grass, traitorous, two-faced, two-timing, undependable, unfaithful, unloyal, unreliable, untrustworthy |
| Main Entry: | dishonest |
| Part of Speech: | adjective |
| Definition: | lying, untruthful |
| Synonyms: | backbiting, bent, bluffing, cheating, corrupt, crafty, crooked, cunning, deceitful, deceiving, deceptive, designing, disreputable, double-crossing, double-dealing, elusive, false, fraudulent, guileful, hoodwinking, mendacious, misleading, perfidious, recreant, shady, shifty, sinister, slippery*, sneaking, sneaky, swindling, traitorous, treacherous, tricky, two-faced, two-timing, unctuous, underhanded, unfair, unprincipled, unscrupulous, untrustworthy, villainous, wily |
| Antonyms: | aboveboard, ethical, fair, frank, honest, moral, open, principled, scrupulous, trustworthy, truthful |
| Main Entry: | disloyal |
| Part of Speech: | adjective |
| Definition: | unfaithful |
| Synonyms: | alienated, apostate, cheating, disaffected, double-crossing, estranged, faithless, false, perfidious, recreant, seditious, snaky, subversive, traitorous, treacherous, treasonable, two-faced, two-timing, unloyal, unpatriotic, untrue, untrustworthy, wormlike |
| Antonyms: | faithful, loyal, true, trustworthy |
| Main Entry: | double-dealing |
| Part of Speech: | adjective |
| Definition: | cheating, deceitful |
| Synonyms: | ambidextrous, crooked, dishonest, double, duplicitous, fraudulent, hypocritical, insincere, left- handed, lying, perfidious, sneaky, swindling, treacherous, tricky, two-faced, two-timing, underhanded, untrustworthy, wily |
| Antonyms: | forthright, honest, truthful |
| Main Entry: | faithless |
| Part of Speech: | adjective |
| Definition: | disloyal |
| Synonyms: | capricious, changeable, changeful, cheating, deceitful, dishonest, double-crossing, double-dealing, doubting, dubious, false, fickle, fluctuating, inconstant, perfidious, recreant, skeptical, traitorous, treacherous, two-faced, two-timing, unbelieving, unconverted, unfaithful, unloyal, unreliable, unstable, untrue, untrustworthy, untruthful, wavering |
| Antonyms: | believing, constant, faithful, loyal, reliable, true |
| Main Entry: | false |
| Part of Speech: | adjective |
| Definition: | dishonest, hypocritical |
| Synonyms: | apostate, base, beguiling, canting, corrupt, crooked, deceitful, deceiving, deceptive, deluding, delusive, devious, dishonorable, disloyal, double-dealing, duplicitous, faithless, falsehearted, forsworn, foul, lying, malevolent, malicious, mean, misleading, mythomaniac, perfidious, perjured, rascally, recreant, renegade, scoundrelly, traitorous, treacherous, treasonable, two-faced, underhanded, unfaithful, unscrupulous, untrustworthy, venal, villainous, wicked |
| Notes: | fallacious means intended to deceive; fallible means liable to make a mistake or to be inaccurate or erroneous; false means not in accordance with the fact or reality or actuality, or deliberately deceptive, or not genuine or real |
| Antonyms: | genuine, honest, just, reliable, right, straight, true, truthful |
| 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 |
| Notes: | insidious (Latin insidere 'to lie in wait for,' from sedere 'sit') describes stealthy, treacherous behavior; invidious behavior arouses ill will, animosity, or hostility |
| Antonyms: | fair, honest, open, sincere |
| Main Entry: | insincere |
| Part of Speech: | adjective |
| Definition: | dishonest, pretended |
| Synonyms: | ambidextrous, backhanded, deceitful, deceptive, devious, disingenuous, dissembling, dissimulating, double, double-dealing, duplicitous, evasive, faithless, fake, false, hollow, hypocritical, lying, mendacious, perfidious, phony, pretentious, put-on, shifty, slick, sly, snide, two-faced, unfaithful, untrue, untruthful |
| Antonyms: | forthright, frank, honest, open, sincere |
| Main Entry: | lying |
| Part of Speech: | adjective |
| Definition: | dishonest |
| Synonyms: | committing perjury, deceitful, deceptive, delusive, delusory, dissembling, dissimulating, double-crossing, double-dealing, equivocating, false, falsifying, fibbing, guileful, inventing, mendacious, misleading, misrepresenting, misstating, perfidious, prevaricating, shifty, treacherous, tricky, two-faced, two-timing, unreliable, untruthful, wrong |
| Antonyms: | direct, frank, honest |