Thesaurus

doubtful

adjective

Synonyms and Antonyms of doubtful

  1. 1 not feeling sure about the truth, wisdom, or trustworthiness of someone or something he was doubtful about the decision to complete the project despite its mounting problems Synonyms of doubtful distrustful, dubious, hinky [slang], mistrustful, skeptical, suspicious, trustless, uncertain, unconvinced, undecided, unsettled, unsure Words Related to doubtful ambivalent, conflicted, equivocal; diffident, insecure; halting, hesitant, indecisive, irresolute, vacillating, wavering Phrases on the fence Near Antonyms of doubtful assured, confident, sanguine, self-assured; decisive, determined, resolute Antonyms of doubtful certain, convinced, positive, sure

  2. 2 giving good reason for being doubted, questioned, or challenged the election results were highly doubtful, so an investigation was begun Synonyms of doubtful debatable, disputable, dodgy [chiefly British], doubtable, dubious, dubitable, equivocal, fishy, problematic (also problematical), queer, questionable, shady, shaky, suspect, suspicious Words Related to doubtful alleged, so-called, supposed; moot; ambiguous, open, unclear; uncertain, undecided, undetermined; far-fetched, flimsy, improbable, unlikely, weak Near Antonyms of doubtful decisive, definitive; clear, obvious, open-and-shut, positive Antonyms of doubtful certain, hands-down, incontestable, indisputable, indubitable, questionless, sure, undeniable, undoubted, unproblematic, unquestionable

  3. 3 not likely to be true or to occur our winning the championship increasingly looks like a doubtful outcome Synonyms of doubtful improbable, dubious, far-fetched, flimsy, questionable, unapt, unlikelyWords Related to doubtful implausible, impossible, inconceivable, incredible, unbelievable, unimaginable, unthinkable; absurd, bizarre, crazy, fantastic (also fantastical), foolish, insane, nonsensical, odd, outlandish, preposterous, ridiculous, unreal, wild; outside, remote, slightNear Antonyms of doubtful believable, conceivable, credible, earthly, imaginable, plausible; possible, potential; liableAntonyms of doubtful likely, probable

  4. 4 open to question or dispute a doubtful claim to the property Synonyms of doubtful arguable, controvertible, disputable, doubtable, debatable, issuable, moot, negotiable, questionableWords Related to doubtful contradictable, refutable; controversial, debated, disputed; dubious, iffy, inconclusive, indecisive, problematic (also problematical), shaky, uncertain; academic (also academical), hypothetical, speculative, theoretical (also theoretic); ambiguous, equivocalNear Antonyms of doubtful irrefutable; definite; unambiguous, unequivocal; absolute, clear, conclusive, decisive; uncontested, undisputedAntonyms of doubtful accomplished, certain, hands-down, inarguable, incontestable, incontrovertible, indisputable, indubitable, irrefragable, positive, questionless, settled, sure, unanswerable, unarguable, unchallengeable, undebatable, undeniable, unquestionable

Synonym Discussion of doubtful

doubtful, dubious, problematic, questionable mean not affording assurance of the worth, soundness, or certainty of something. doubtful implies little more than a lack of conviction or certainty.
    • doubtful about whether I said the right thing
dubious stresses suspicion, mistrust, or hesitation.
    • dubious about the practicality of the scheme
problematic applies especially to things whose existence, meaning, fulfillment, or realization is highly uncertain.
    • whether the project will ever be finished is problematic
questionable may imply no more than the existence of doubt but usually suggests that the suspicions are well-grounded.
    • a man of questionable honesty

Learn More about doubtful


Seen and Heard

What made you want to look up doubtful? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to praise usually to excess

Get Word of the Day daily email!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!