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doubtful

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The definition of doubtful is suspicious, unclear or unsure.

(adjective)

An example of something doubtful is a situation reported by a person who constantly lies.

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See doubtful in Webster's New World College Dictionary

adjective

in doubt; not clear or definite; ambiguous
not clearly predictable; uncertain; unsure
giving rise to doubt or suspicion; questionable, as in reputation
feeling doubt; unsettled in opinion or belief

Origin: ME douteful

Related Forms:

doubtfully adverb
doubtfulness noun

See doubtful in American Heritage Dictionary 4

adjective

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

Related Forms:

doubtˈful·ly adverb

doubtˈful·ness noun

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