Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Sardinian
babbu
←
Italian
babbo
(cognate)
←
Romansch
bab
(cognate)
→
Romansch
bap
(cognate)
→
Romansch
bab
(cognate)