Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Westrobothnian
tom
←
Proto-Germanic
*tōmaz
(inherited)
←
Old Norse
tómr
(inherited)
→
Westrobothnian
tåomång
(suffix)
→
Westrobothnian
tommlöyt
(compound)
→
Westrobothnian
tommom
(suffix)