Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
kökkur
←
Proto-Germanic
*kankuz
(inherited)
←
Old Norse
kǫkkr
(inherited)
→
Icelandic
kekkur
(mention)