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

→ English ickle (inherited)
→ English eckle (inherited)
→ Old English gicel (inherited)
→ Middle English ikil (mention)
→ Faroese jøkul (mention)
→ Icelandic jökull (mention)
→ Old Norse jǫkull (mention)