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Old English dora (inherited)
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Old English drān (cognate)
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Middle Dutch dorne (cognate)
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Middle English dorre (inherited)
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Middle English dore (mention)
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Proto-Germanic *durô (inherited)
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Middle Low German dorne (cognate)
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Proto-Indo-European *dʰer- (derived)
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Proto-Indo-European *dʰrēn- (mention)
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Saterland Frisian Doarne (cognate)
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Old English dora (link)
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Middle Irish dord (mention)
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Saterland Frisian Doarne (cognate)