suspicious

1 giving good reason for being doubted, questioned, or challenged suspicious claims of being the rightful owner of the property Synonyms debatable, disputable, dodgy [chiefly British], doubtable, dubious, dubitable, equivocal, fishy, problematic (also problematical), queer, questionable, shady, shaky, suspect, doubtfulRelated Words alleged, so-called, supposed; moot; ambiguous, open, unclear; uncertain, undecided, undetermined; far-fetched, flimsy, improbable, unlikely, weakNear Antonyms decisive, definitive; clear, obvious, open-and-shut, positiveAntonyms certain, hands-down, incontestable, indisputable, indubitable, questionless, sure, undeniable, undoubted, unproblematic, unquestionable

2 inclined to doubt or question claims suspicious of any menu dish having a name she can't pronounce Synonyms disbelieving, distrustful, doubting, incredulous, mistrustful, negativistic, questioning, show-me, suspecting, skeptical, unbelievingRelated Words paranoid (also paranoidal); critical, puzzled, quizzical; careful, cautious, guarded, gun-shy, leery (also leary), wary, watchful; cynical, experienced, knowing, sophisticated, worldly, worldly-wise; curious, inquiring, inquisitive, nosy (or nosey), snoopy; uncertain, unconvinced, undecided, undetermined, unsettled, unsure; hesitantNear Antonyms green, ingenuous, innocent, naive (or naïve), simple, simpleminded, unknowing, unsophisticated, unworldly, wide-eyed; certain, confident, positive, sure; callow, inexperienced, raw; childlike, idealistic, impractical; beguiled, deceived, duped, gulled, tricked; careless, heedless, unsuspecting, unsuspicious, unwaryAntonyms credulous, gullible (also gullable), trustful, trusting, uncritical, unquestioning

3 not feeling sure about the truth, wisdom, or trustworthiness of someone or something you should be very suspicious of those telephone calls from people telling you that you're the winner of a contest you never entered Synonyms distrustful, dubious, hinky [slang], mistrustful, skeptical, doubtful, trustless, uncertain, unconvinced, undecided, unsettled, unsureRelated Words ambivalent, conflicted, equivocal; diffident, insecure; halting, hesitant, indecisive, irresolute, vacillating, waveringNear Antonyms assured, confident, sanguine, self-assured; decisive, determined, resoluteAntonyms certain, convinced, positive, sure