| Main Entry: | undependable |
| Part of Speech: | adjective |
| Definition: | irresponsible |
Synonyms: |
bum, capricious, careless, changeable, dubious, erratic, fickle, fly-by-night, inconsistent, inconstant, indefinite, indeterminate, loose*, no bargain, no-good, treacherous, trick, tricky, trustless, unassured, uncertain, unpredictable, unreliable, unsafe, unsound, unstable, unsure, untrustworthy, variable |
Antonyms: |
dependable, reliable, responsible, trustworthy |
| 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: | fly-by-night |
| Part of Speech: | adjective |
| Definition: | unreliable and shady |
Synonyms: |
brief, cowboy, disreputable, dubious, ephemeral, evanescent, fleeting, here-today-gone-tomorrow, impermanent, irresponsible, momentary, not to be relied upon, not to be trusted, passing, questionable, shady, shifty, short-lived, slimy*, slippery*, temporary, treacherous, trustless, undependable, unprofessional, unreliable, unsure, untrustworthy |
Antonyms: |
dependable, reliable, reputable, responsible, trustworthy |
| Main Entry: | inconstant |
| Part of Speech: | adjective |
| Definition: | changeable |
Synonyms: |
capricious, changeful, erratic, fickle, flickering, fluctuating, impulsive, inconsistent, intermittent, irregular, irresolute, mercurial, shifting, uncertain, undependable, unreliable, unsettled, unstable, vacillating, variable, varying, volatile, waffling, wavering |
| Main Entry: | indefinite |
| Part of Speech: | adjective |
| Definition: | ambiguous, vague |
Synonyms: |
broad, confused, doubtful, dubious, equivocal, evasive, general, ill-defined, imprecise, indeterminable, indeterminate, indistinct, inexact, inexhaustible, infinite, innumerable, intangible, loose, obscure, shadowy, uncertain, unclear, undefined, undependable, undetermined, unfixed, unknown, unlimited, unsettled, unspecific, unsure, wide |
Antonyms: |
certain, definite, distinct, sure |
| Main Entry: | irresponsible |
| Part of Speech: | adjective |
| Definition: | careless, reckless |
Synonyms: |
capricious, carefree, devil-may-care, feckless, fickle, flighty, fly-by-night, giddy, harebrained, ill-considered, immature, immoral, incautious, lax, loose*, no-account, rash, scatterbrained, shiftless, thoughtless, unaccountable, unanswerable, uncareful, undependable, unpredictable, unreliable, unstable, untrustworthy, wild |
Antonyms: |
accountable, careful, liable, reliable, responsible, trustworthy |
| Main Entry: | perfidious |
| 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: | shaky |
| Part of Speech: | adjective |
| Definition: | doubtful |
Synonyms: |
dubious, indecisive, not dependable, not reliable, precarious, problematic, questionable, suspect, uncertain, unclear, undependable, unreliable, unsettled, unsound, unsteady, unsupported, unsure |
Antonyms: |
certain, firm, indubious, sure |
| Main Entry: | skittish |
| Part of Speech: | adjective |
| Definition: | very nervous |
Synonyms: |
agitable, alarmable, capricious, changeable, combustible, dizzy*, edgy, excitable, excited, fearful, fickle, fidgety, flighty, frivolous, giddy, harebrained, high-strung, irresponsible, jumpy, lightheaded, lively, peppy, playful, restive, scatterbrained, sensitive, spirited, undependable, unreliable, volative, whimsical, zippy |
Antonyms: |
calm, collected, easy-going, laid-back, unworried |