Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
ferðast
→
Westrobothnian
fäläs
(inherited)
→
Norwegian Bokmål
ferdes
(derived)
→
Norwegian Nynorsk
ferdast
(derived)