←
Proto-Germanic *twai (inherited)
←
Old Swedish tver (inherited)
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Old Swedish þva (inherited)
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Proto-Indo-European *dwóh₁ (derived)
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Old Norse tveir (inherited)
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Old Norse þvá (inherited)
→
Westrobothnian tjwå (borrowed)
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Elfdalian twå (cognate)
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Swedish tvätt (mention)
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Swedish tvaga (mention)