Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Scottish Gaelic dubh
Breton du (cognate)
Gaulish - (cognate)
Gaulish Dubis (mention)
Proto-Celtic *dubus (inherited)
Welsh du (cognate)
German taub (cognate)
English Doubs (mention)
English deaf (cognate)
English dumb (cognate)
Gothic 𐌳𐌰𐌿𐌱𐍃 (cognate)
Ancient Greek τυφλός (cognate)
Proto-Indo-European *dʰewbʰ- (root)
Proto-Indo-European *dʰewbʰ- (inherited)
Cornish duv (cognate)
Cornish du (mention)
Old Irish dub (inherited)

English Douglas (derived)
English Dougal (mention)
English sgian dubh (mention)
Scottish Gaelic Dùbhlachd (mention)
Scottish Gaelic bòrd-dubh (affix)
Scottish Gaelic ainleag-dhubh (mention)
Scottish Gaelic seillean-dubh (compound)
Scottish Gaelic sgian-dubh (compound)