Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Aromanian
ou
←
Latin
ovum
(inherited)
←
Latin
ovum
(inherited)
←
Romanian
ou
(cognate)
→
Sardinian
ou
(cognate)
→
Sardinian
ovu
(cognate)
→
Sardinian
obu
(cognate)