Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Old High German ahtozehan

→ Old English eahtatiene (cognate)
→ Cimbrian achtzane (inherited)
→ German achtzehn (inherited)
→ Old Norse átján (cognate)
→ Old Norse áttján (cognate)
→ Vilamovian aochcao (inherited)
→ Yiddish אַכצן (derived)