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Old English rēċċan (cognate)
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Old English rēċan (mention)
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English retch (cognate)
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Middle English recken (inherited)
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Middle English rekken (mention)
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Middle English reken (mention)
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Proto-Indo-European *rēǵ- (derived)
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Proto-Indo-European *rēg- (mention)
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Icelandic rækja (cognate)
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Low German roken (cognate)
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Low German ruken (mention)
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Old Norse rœkja (derived)