questionable synonyms

controversial uncertain vague mysterious doubtful incredible obscure provisional ambiguous problematic contingent hypothetical indefinite enigmatic paradoxical unsettled inconclusive occult arguable debatable indeterminate cryptic moot equivocal undefined apocryphal unconfirmed oracular disputable in question

suspect suspicious notorious unsatisfactory irregular dubious unpopular unreliable illegitimate dishonest disagreeable unsound disreputable untrustworthy discreditable ill-favored fly-by-night evil-looking