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Old English þurruc (inherited)
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Old English þurh (cognate)
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Old English þuruh (mention)
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Middle Dutch durck (cognate)
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Middle Dutch dorck (mention)
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Middle English thurrok (inherited)
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Middle Low German dork (cognate)
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Proto-West Germanic *þurruk (inherited)
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Proto-Indo-European *terg- (derived)
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Proto-Indo-European *terǵ- (mention)
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Saterland Frisian durk (cognate)