Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Proto-Indo-European *dʰewbʰ-

→ English abysmal (root)
→ English abyss (root)
→ English dub (derived)
→ English dove (derived)
→ English deep (root)
→ English depth (root)
→ English daff (root)
→ English daff (derived)
→ English deaf (root)
→ English deaf (inherited)
→ English butt (derived)
→ English duff (derived)
→ English deafen (root)
→ English dumb (root)
→ English dumb (inherited)
→ English dumb (derived)
→ English dumb (root(en/enm))
→ English typhus (root)
→ English paratyphoid (root)
→ English paratyphoid fever (root)
→ English sgian dubh (derived)
→ Old English deaf (root)
→ Old English dumb (root)
→ Bulgarian дъно (root)
→ Breton du (root)
→ Breton du (derived)
→ Breton don (root)
→ Breton dour (root)
→ Czech Debř (derived)
→ Czech debř (derived)
→ Old Church Slavonic дъно (root)
→ Welsh du (root)
→ Welsh du (derived)
→ Welsh dŵr (root)
→ Welsh dwfn (root)
→ Danish dum (derived)
→ Danish duft (derived)
→ German dumm (derived)
→ German taub (derived)
→ Middle English dumben (derived)
→ Irish dubh (root)
→ Irish dubh (inherited)
→ Irish domhan (root)
→ Irish dobharchú (root)
→ Irish Domhan (root)
→ Irish domhain (root)
→ Irish dobhar (root)
→ Scottish Gaelic dubh (root)
→ Scottish Gaelic dubh (inherited)
→ Scottish Gaelic domhan (root)
→ Scottish Gaelic Domhan (root)
→ Scottish Gaelic sgian-dubh (derived)
→ Old High German tumb (root)
→ Old High German tumb (derived)
→ Gothic 𐌳𐌰𐌿𐍀𐌾𐌰𐌽 (root)
→ Gothic 𐌳𐌹𐌿𐍀𐍃 (root)
→ Gothic 𐌳𐌹𐌿𐍀𐌴𐌹 (root)
→ Gothic 𐌳𐌹𐌿𐍀𐌹𐌸𐌰 (root)
→ Gothic 𐌳𐌰𐌿𐍀𐌴𐌹𐌽𐍃 (root)
→ Gothic 𐌲𐌰𐌳𐌹𐌿𐍀𐌾𐌰𐌽 (root)
→ Ancient Greek τυφλός (root)