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doubtful▼(experiencing or showing doubt)adjective[UK: ˈdaʊt.fʊl] [US: ˈdaʊt.fəl]
uncertain▼(not known for certain; questionable)adjective[UK: ʌn.ˈsɜːt.n̩] [US: ʌn.ˈsɝː.tn̩]
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