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
debatable, disputable, dodgy [chiefly British], doubtable, doubtful, dubitable, equivocal, fishy, problematic (also problematical), queer, questionable, shady, shaky, suspect, suspicious
alleged, so-called, supposed
moot
ambiguous, open, unclear
uncertain, undecided, undetermined
far-fetched, flimsy, improbable, unlikely, weak
certain, hands-down, incontestable, indisputable, indubitable, questionless, sure, undeniable, undoubted, unproblematic, unquestionable
2
slow to begin or proceed with a course of action because of doubts or uncertainty
- I'm dubious about our plan to go hang gliding without having had any training
uneager, unenthusiastic
averse, unwilling
ambivalent, conflicted, doubtful, faltering, halting, indecisive, infirm, irresolute, questioning, skeptical, uncertain, undecided, unsure, vacillating, wobbly (also wabbly)
fainthearted, shy, timid
eager, enthusiastic, glad, happy, keen
ready, willing
certain, decided, determined, resolute, sure, unquestioning
3
not likely to be true or to occur
- made the dubious claim of being of royal blood
implausible, impossible, inconceivable, incredible, unbelievable, unimaginable, unthinkable
absurd, bizarre, crazy, fantastic (also fantastical), foolish, insane, nonsensical, odd, outlandish, preposterous, ridiculous, unreal, wild
outside, remote, slight
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
distrustful, doubtful, hinky [slang], mistrustful, skeptical, suspicious, trustless, uncertain, unconvinced, undecided, unsettled, unsure
