Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Italic
*oktō
→
Corsican
ottu
(inherited)
→
Piedmontese
eut
(inherited)
→
Sardinian
oto
(inherited)