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 *dʰwer-

→ English door (root)
→ English door (mention)
→ English forum (root)
→ English forensic (root)
→ English thyroid (root)
→ English thyro- (root)
→ English Nanterre (root)
→ Avestan 𐬛𐬎𐬎𐬀𐬭 (inherited)
→ Afrikaans deur (inherited)
→ Old English duru (root)
→ Old English duru (derived)
→ Arabic ترس (derived)
→ Arabic درقة (derived)
→ Arabic دریچه (derived(ar/fa))
→ Belarusian дзверы (derived)
→ Catalan fora (derived)
→ Cebuano pwera (derived)
→ Cebuano puyra (derived)
→ Cappadocian Greek θίρ (root)
→ Cappadocian Greek θίρ (derived)
→ Czech dveře (derived)
→ Old Church Slavonic двьри (derived)
→ Old Church Slavonic двьрь (derived)
→ Welsh drws (root)
→ Welsh dôr (root)
→ Danish dør (root)
→ Danish dør (derived)
→ German Tor (root)
→ German Tür (root)
→ German Tür (derived)
→ Middle Dutch dore (derived)
→ Greek θύρα (derived)
→ Spanish fuera (derived)
→ Persian در (root)
→ Persian در (inherited)
→ Faroese dyr (root)
→ Faroese dyr (derived)
→ French for (root)
→ French fur (root)
→ French dehors (root)
→ French forum (root)
→ French hors (root)
→ French Nanterre (root)
→ West Frisian doar (root)
→ West Frisian doar (derived)
→ Irish doras (root)
→ Irish doras (derived)