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Middle English douten (inherited)
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Middle English dout (inherited)
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Middle English doute (mention)
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Old French doter (mention)
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Old French duter (mention)
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Old French doute (derived)
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Old French dote (mention)
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Old French dute (mention)
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Old French doter (mention)
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Old French duter (mention)
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Proto-Indo-European *dwóh₁ (derived)
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Esperanto dubi (cognate)
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Norwegian Bokmål tvil (link)