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Old English dol (inherited)
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Middle English dull (inherited)
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Middle English dul (mention)
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Middle English dyll (mention)
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Middle English dill (mention)
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Middle English dwal (mention)
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North Frisian dol (cognate)
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Proto-Germanic *dulaz (inherited)
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Proto-Indo-European *dʰwel- (inherited)
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Proto-Indo-European *dʰewel- (mention)
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Icelandic dulur (cognate)
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Low German dul (cognate)
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Low German dol (mention)
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Norwegian Bokmål dump (link)
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Norwegian Nynorsk dump (link)
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Vilamovian duł (cognate)