Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*sainaz
→
Danish
sen
(derived)
→
Westrobothnian
sein
(inherited)
→
Westrobothnian
sain
(inherited)
→
Icelandic
seinn
(derived)