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doubtful

/ˈdaʊtfəl/adjective2 syllables

Doubtful means: open to doubt or suspicion.

Synonyms for doubtful9

adjective, as in open to doubt or suspicion

dubious, dubitable, in question, questionable

adjective, as in fraught with uncertainty or doubt

dubious, uncertain, unsure, incertain

adjective, as in unsettled in mind or opinion

tentative, unsettled

What does doubtful mean?3

adjective

1

open to doubt or suspicion“the candidate's doubtful past”

2

fraught with uncertainty or doubt“they were doubtful that the cord would hold”

3

unsettled in mind or opinion“drew a few tentative conclusions”

Definitions from the Open English WordNet, CC BY 4.0.

Doubtful in a sentence

  • It is doubtful whether her song will become popular.unknown
  • I thought it doubtful whether he would come or not.unknown
  • He also came up with yet another doubtful conclusion.jeanne
  • He was doubtful about which way to take.unknown
  • It is doubtful whether the rumor is true or not.CM
  • Whether or not he will come is doubtful.CM
  • It is doubtful whether this method will work.CK
  • It is doubtful whether this machine works well or not.Jesse

Sentences from Tatoeba, CC BY 2.0 FR, credited to their authors.