Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Westrobothnian
sak
←
Proto-Germanic
*sakō
(derived)
←
Old Norse
sǫk
(derived)
→
Westrobothnian
saklaus
(suffix)