Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Aromanian
dzãr
←
Latin
serum
(derived)
←
Romanian
zer
(cognate)
→
Romanian
zer
(cognate)
→
Aromanian
dzer
(link)