doubtful

adj.

1. Subject to or causing doubt: a doubtful claim; doubtful prospects.
2. Experiencing or showing doubt: Doubtful that the cord would hold, we strengthened it.
3. Of uncertain outcome; undecided.
4. Raising doubts as to legitimacy, honesty, or respectability; suspicious: the candidate's doubtful past. See Usage Note at doubt.

doubtfully doubt'ful·ly adv.
doubtfulness doubt'ful·ness n.

adjective

1. Not affording certainty: ambiguous, borderline, chancy, clouded, dubious, dubitable, equivocal, inconclusive, indecisive, indeterminate, problematic, problematical, questionable, uncertain, unclear, unsure. Informal iffy. Idioms: at issue, in doubt, in question. See certain/uncertain, clear/unclear.
2. Not likely: improbable, questionable, unapt, unlikely. See likely/unlikely.
3. Experiencing doubt: dubious, skeptical, uncertain, undecided, unsure. Idioms: in doubt. See certain/uncertain.
4. In doubt or dispute: arguable, contested, debatable, disputable, exceptionable, moot, mootable, problematic, problematical, questionable, uncertain. See certain/uncertain.
5. Of dubious character: equivocal, questionable, shady, suspect, suspicious, uncertain. Informal fishy. See honest/dishonest.

adj

Definition: not believing
Antonyms: believing, certain, confident, convinced, sure, trusting

adj

Definition: questionable, unclear
Antonyms: certain, clear, confirmed, decided, definite, exact, resolved, settled, unquestionable

---

IN BRIEF: Causing uncertainty.

It is doubtful that she will win a gold medal in the Olympics.

Dansk (Danish)
adj. - i tvivl, tvivlsom, utroværdig

Nederlands (Dutch)
twijfelachtig, weifelend, onwaarschijnlijk

Français (French)
adj. - indécis, incertain, douteux, équivoque, suspect, discutable

Deutsch (German)
adj. - zweifelnd, skeptisch, ungläubig, fraglich, zweifelhaft, ungewiß

Ελληνική (Greek)
adj. - αμφίβολος, αβέβαιος, επισφαλής, αμφισβητήσιμος, αναποφάσιστος

Italiano (Italian)
dubbio, dubbioso, incerto

Português (Portuguese)
adj. - duvidoso

Русский (Russian)
сомневающийся, сомнительный

Español (Spanish)
adj. - dudoso, incierto

Svenska (Swedish)
adj. - tvivelaktig, tveksamt

中文（简体）(Chinese (Simplified))
可疑的, 不确的, 疑心的

中文（繁體）(Chinese (Traditional))
adj. - 可疑的, 不確的, 疑心的

한국어 (Korean)
adj. - 의심하는, 자신이 없는, (결과 등이) 불확실한, (사람 등이) 의심스러운

日本語 (Japanese)
adj. - 疑っている, 疑わしい, あいまいな, いかがわしい

العربيه (Arabic)
‏(صفه) مشكوك فيه أو بأمره, مبهم‏

עברית (Hebrew)
adj. - ‮בספק, מפוקפק, מסופק‬

If you are unable to view some languages clearly, click here.

To select your translation preferences click here.