doubtful Meaning, definition in Cambridge English Dictionary
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Meaning of "doubtful" - English Dictionary

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doubtfuladjective

uk   us   /ˈdaʊt.fəl/
B2 If you are doubtful about something, you are uncertain about it: The teacher is doubtful about having parents working as classroom assistants.B2 If a situation is doubtful, it is unlikely to happen or to be successful: It is doubtful whether/if they ever reached the summit before they died. It was doubtful that the money would ever be found again.
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doubtfully
adverb uk   us   /-i/
"Are you telling me the truth?" he asked doubtfully.
(Definition of doubtful from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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