Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-West Germanic
*igil
→
Old English
igil
(inherited)
→
German
Igel
(inherited)
→
Old High German
igil
(inherited)
→
Luxembourgish
Igel
(inherited)