Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Elfdalian
buok
←
Proto-Germanic
*bōks
(derived)
←
Proto-Indo-European
*bʰeh₂ǵos
(derived)
←
Old Norse
bók
(derived)
←
Swedish
bok
(cognate)