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| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | not trustworthy, not true |
| Synonyms: | capricious, deceitful, deceptive, delusive, disreputable, dubious, erroneous, fake, fallible, false, fickle, fly-by-night, furtive, hallucinatory, hollow, implausible, inaccurate, inconstant, irresponsible, makeshift, meretricious, mistaken, pretended, pseudo*, questionable, sham, shifty, specious, treacherous, tricky, uncertain, unconvincing, undependable, underhand, underhanded, unfaithful, unsound, unstable, unsure, untrue, untrustworthy, vacillating, wavering, weak |
| Antonyms: | honest, reliable, responsible, true, trustworthy |
* = informal/non-formal usage
| Main Entry: | changeable |
| Part of Speech: | adjective |
| Definition: | erratic |
| Synonyms: | agitated, capricious, changeful, commutative, convertible, fickle, fitful, flighty, fluctuating, fluid, impulsive, inconstant, indecisive, irregular, irresolute, irresponsible, kaleidoscopic, mercurial, mobile, movable, mutable, permutable, protean, restless, reversible, revocable, shifting, skittish, spasmodic, transformable, transitional, uncertain, unpredictable, unreliable, unsettled, unstable, unsteady, vacillating, vagrant, variable, variant, varying, versatile, volatile, wavering, whimsical |
| Antonyms: | certain, changeless, constant, fixed, lasting, reliable, stable, steady, sure, unchangeable, undeviating |
| Main Entry: | deceptive |
| Part of Speech: | adjective |
| Definition: | dishonest |
| Synonyms: | ambiguous, astucious, beguiling, bum*, catchy, crafty, cunning, deceitful, deceiving, deluding, delusive, delusory, designing, disingenuous, fake, fallacious, false, fishy, foxy, fraudulent, illusory, imposturous, indirect, insidious, lying, misleading, mock, oblique, off*, phony, plausible, rascal, roguish, scheming, seeming, serpentine, shifty, slick, slippery, sly, sneaky, snide, specious, spurious, subtle, treacherous, tricky, two-faced, underhand, underhanded, unreliable, wily |
| Notes: | deceitful means intended to deceive or cheat while deceptive means causing one to believe what is not true or likely to mislead someone |
| Antonyms: | forthright, frank, honest, open, truthful, upright |
* = informal/non-formal usage
| Main Entry: | derelict |
| Part of Speech: | adjective |
| Definition: | careless, negligent |
| Synonyms: | behindhand, delinquent, disregardful, irresponsible, lax, regardless, remiss, slack, undependable, unreliable, untrustworthy |
| Antonyms: | careful, caring |
| Main Entry: | dubious |
| Part of Speech: | adjective |
| Definition: | doubtful |
| Synonyms: | arguable, chancy, debatable, diffident, disputable, dubitable, equivocal, far-fetched, fishy, fly-by-night, hesitant, iffy, improbable, indecisive, moot, mootable, open, perplexed, problematic, questionable, reluctant, shady, skeptical, suspect, suspicious, touch and go, trustless, unassured, uncertain, unclear, unconvinced, undecided, undependable, unlikely, unreliable, unsure, untrustworthy, untrusty, wavering |
| Notes: | a person is capable of doubting, whereas a thing is dubitable; dubious, unlike doubtful, carries the connotation of suspicion |
| Antonyms: | certain, definite, doubtless, positive, reliable, sure, trustworthy, trusty, undoubtful |
| Main Entry: | errant |
| Part of Speech: | adjective |
| Definition: | wrong; deviant |
| Synonyms: | aberrant, deviating, devious, drifting, errable, erratic, erring, fallible, heretic, meandering, misbehaving, mischievous, miscreant, naughty, off straight and narrow, offending, rambling, ranging, roaming, roving, shifting, sinning, stray, straying, unorthodox, unreliable, wandering, wayward |
| Notes: | an errand is a short trip that is taken for a specific purpose; arrant means thoroughgoing - downright - out-and-out - extreme - notorious; errant means wandering or roving especially in search of adventure - deviating or straying from an appointed course - straying from the proper standards - moving aimlessly or irregularly |
| Antonyms: | correct, righteous |
| Main Entry: | erratic |
| Part of Speech: | adjective |
| Definition: | unpredictable; wandering |
| Synonyms: | aberrant, abnormal, anomalous, arbitrary, bizarre, capricious, changeable, desultory, devious, dicey, directionless, dubious, eccentric, fitful, flaky*, fluctuant, idiosyncratic, iffy, incalculable, inconsistent, inconstant, irregular, meandering, mercurial, nomadic, oddball, peculiar, planetary, rambling, roving, shifting, spasmodic, strange, stray, uncertain, undirected, unnatural, unreliable, unstable, unusual, vagarious, variable, volatile, wayward, weird, whimsical |
| Antonyms: | certain, consistent, definite, dependable, predictable, regular, reliable, steady, sure, unchanging |
* = informal/non-formal usage
| 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: | fallible |
| Part of Speech: | adjective |
| Definition: | able or prone to err |
| Synonyms: | careless, deceptive, errable, errant, erring, faulty, frail, heedless, human, ignorant, imperfect, in question, liable, mortal, questionable, uncertain, unreliable, untrustworthy, weak |
| 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: | certain, correct, definite, infallible, perfect, reliable, strong, sure, unerring |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
