Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
kǫstr
←
Proto-Germanic
*kastuz
(inherited)
←
Proto-Indo-European
*kas-
(root)
←
Proto-Indo-European
*h₂ǵ-es-
(inherited)
→
Icelandic
köstur
(derived)