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Old English dumb (inherited)
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Middle English dumb (inherited)
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Middle English dumben (inherited)
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North Frisian dom (cognate)
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North Frisian domme (mention)
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West Frisian dom (cognate)
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Proto-Germanic *dumbaz (inherited)
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Proto-West Germanic *dumb (inherited)
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Proto-Indo-European *dʰewbʰ- (inherited)
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Proto-Indo-European *dʰewbʰ- (derived)
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Proto-Indo-European *dʰewbʰ- (root(en/enm))
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Scottish Gaelic dubh (cognate)
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Luxembourgish domm (cognate)
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Norwegian Bokmål dum (cognate)
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German Low German dumm (cognate)
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Saterland Frisian dum (link)