←
Old English swearm (inherited)
←
Middle English swarm (inherited)
←
Middle English swarmen (inherited)
←
Proto-Indo-European *swer- (derived)
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Lithuanian surma (cognate)
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Saterland Frisian Swoorm (cognate)
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Swedish svärm (cognate)
→
Norwegian Bokmål sverm (link)
→
Saterland Frisian Swoorm (link)