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Old English swīfan (inherited)
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Old English swift (cognate)
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Middle English swiven (inherited)
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Middle English swyvel (cognate)
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Proto-Indo-European *weyp- (derived)
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Norwegian Nynorsk sviva (cognate)
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Old Norse svífa (cognate)
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Old Frisian swīva (cognate)
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Old Frisian swīfa (mention)