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 *h₂eyǵ-

→ English oak (root)
→ English oak (derived)
→ English aegis (derived)
→ English aegilops (root)
→ Afrikaans eik (derived)
→ Old English ac (root)
→ Old English ac (derived)
→ Danish eg (root)
→ Danish eg (derived)
→ German Eiche (root)
→ Middle Dutch eike (derived)
→ Greek αίγα (derived)
→ Finnish vuohi (root)
→ Faroese eik (root)
→ Faroese eik (derived)
→ North Frisian iik (root)
→ West Frisian iik (root)
→ Westrobothnian eik (root)
→ Westrobothnian eik (inherited)
→ Old High German eih (root)
→ Old High German eih (derived)
→ Ancient Greek αἴξ (derived)
→ Ancient Greek αἰγίλωψ (root)
→ Ancient Greek αἰγίλωψ (derived)
→ Ancient Greek αἰγίλωψ (derived)
→ Icelandic eik (root)
→ Icelandic eik (derived)
→ Latin aesculus (inherited)
→ Lithuanian ožys (derived)
→ Lithuanian ąžuolas (root)
→ Lithuanian ąžuolas (inherited)
→ Latvian āzis (mention)
→ Marshallese uuk (derived)
→ Norwegian Bokmål eik (root)
→ Norwegian Bokmål eik (mention)
→ Norwegian Bokmål Egersund (mention)
→ Dutch eik (root)
→ Dutch eik (derived)
→ Norwegian Nynorsk eik (root)
→ Norwegian Nynorsk eik (derived)
→ Old Norse eik (root)
→ Old Norse eik (derived)
→ Old Saxon ek (root)
→ Scots aik (derived)