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dubious

Synonyms and Antonyms of dubious

1 giving good reason for being doubted, questioned, or challenged

  • any letter bearing the signature of Geronimo would be of dubious authenticity, to say the least
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2 slow to begin or proceed with a course of action because of doubts or uncertainty

  • Iʼm dubious about our plan to go hang gliding without having had any training
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3 not likely to be true or to occur

  • made the dubious claim of being of royal blood
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4 not feeling sure about the truth, wisdom, or trustworthiness of someone or something

  • dubious about a diet that claims I can eat all I want and still lose weight
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on the fence

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Synonym Discussion of dubious

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


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