Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Batak
*pusəg
→
Toba Batak
pusok
(inherited)
→
Simalungun Batak
pusog
(inherited)
→
Karo Batak
pusung
(inherited)