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adjective doubtful pronunciation in British English /ˈdaʊtf(ə)l/
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  1. 1
    [not usually before noun] not certain or likely to happen or be true
    Already the whole project was looking doubtful.
    it is doubtful (that)/whether/if/how: It is doubtful whether he will survive.
    1. a.
      mainly journalism unlikely to be doing something, especially playing in a match
      Kirkwood is doubtful for tonight’s match.
  2. 2
    [not usually before noun] not feeling certain about something
    You still seem a bit doubtful.
    doubtful about: He was doubtful about the accuracy of the results.
    doubtful (that)/whether/if: The board was doubtful that her estimates were realistic.
  3. 3
    [usually before noun] not satisfactory or acceptable
    documents of doubtful authenticity

derived word

doubtfully

 doubtful pronunciation in British English adverb

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a meal served in the evening which consists of foods traditionally eaten at breakfast

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