Doubtful

Adjective

 * 1) Subject to, or causing doubt
 * 2) Experiencing or showing doubt
 * 3) Undecided or of uncertain outcome
 * 4)  Fearsome, dreadful.
 * 5) Improbable or unlikely
 * 6) Suspicious, or of dubious character
 * 7) Unclear or unreliable

Adverbs for Doubtful
altogether; reasonably; seriously; gravely; vexatiously; still; wholly; timidly; vaguely; hazily; bewilderingly; mysteriously; enigmatically;  ignorantly;   distractedly; nervously; uncertainly; embarrassingly; elusively; remarkably; singularly; inexplicably; oddly.

Thesaurus
Humean, Pyrrhonic, a bit thick, a bit thin, absurd, agnostic, ambiguous, amoral, arguable, at issue, beyond belief, borderline, chancy, clouded, confutable, conjectural, conscienceless, contestable, contingent, controversial, controvertible, corrupt, corrupted, criminal, crooked, dark, debatable, deniable, devious, dishonest, dishonorable, disputable, disreputable, distrustful, doubtable, doubting, dubious, dubitable, equivocal, evasive, felonious, fishy, fraudulent, from Missouri, hard of belief, hard to believe, hardly possible, hazy, hesitant, hesitating, iffy, ill-got, ill-gotten, immoral, implausible, improbable, in dispute, in doubt, in dubio, in question, inconceivable, incredible, incredulous, indecisive, indefinite, indeterminate, indirect, insecure, insidious, leery, mistakable, mistrustful, mistrusting, moot, more than doubtful, not deserving belief, not kosher, obscure, open, open to doubt, open to question, open to suspicion, passing belief, precarious, preposterous, problematic, queasy, questionable, questioning, refutable, ridiculous, rocky, rotten, sceptical, scrupulous, shady, shaky, shameless, shifty, shy, sinister, skeptic, skeptical, slippery, speculative, staggering belief, suppositional, suspect, suspecting, suspicious, tall, thick, thin, tottery, touch-and-go, treacherous, tricky, unbelievable, uncertain, unclear, unconscienced, unconscientious, unconscionable, unconvinced, unconvincing, undecided, undependable, underhand, underhanded, unearthly, uneasy, unethical, ungodly, unhealthy, unimaginable, unlikely, unpredictable, unprincipled, unpromising, unreliable, unresolved, unsafe, unsavory, unscrupulous, unsettled, unsound, unstable, unsteady, unstraightforward, unsure, unthinkable, untrusting, untrustworthy, unworthy of belief, vacillating, vague, wary, without remorse, without shame

Etymology
From.

Translations

 * Bulgarian: съмнителен
 * Finnish:
 * French: ,
 * German:


 * Russian: сомнительный
 * Scottish Gaelic: mì-chinnteach
 * Telugu: సంశయాత్మకమైన (samSayaatmakamaina)


 * Bulgarian: съмняващ се
 * Danish: ,
 * Finnish: ,


 * German:
 * Norwegian:
 * Bokmål: tvilende
 * Nynorsk: tvilande
 * Scottish Gaelic: mì-chinnteach
 * Telugu: సంశయాత్మకమైన (samSayaatmakamaina)


 * Bulgarian: несигурен
 * Danish: tvivlsom
 * Finnish:
 * German:


 * Russian: сомнительный
 * Scottish Gaelic: mì-chinnteach
 * Telugu: సంశయాత్మకమైన (samSayaatmakamaina)


 * Bulgarian: невероятен
 * Danish: tvivlsom
 * Finnish:


 * German:
 * Russian: сомнительный
 * Telugu: సంశయాత్మకమైన (samSayaatmakamaina)


 * Bulgarian: подозрителен
 * Czech:
 * Danish: tvivlsom


 * Finnish:, ,
 * German:
 * Telugu: సంశయాత్మకమైన (samSayaatmakamaina)