Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Germanic [[*ek]], [[*ik]]

→ Old English ic (inherited)
→ German ich (inherited)
→ Middle English I (inherited)
→ Central Franconian ich (inherited)
→ Hunsrik ich (inherited)
→ Limburgish ich (inherited)
→ Scots I (inherited)