Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Danish
iegh
←
Proto-Germanic
*ek
(inherited)
←
Proto-Indo-European
*éǵh₂
(inherited)
←
Old Norse
ek
(inherited)