Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Venetian
medemo
→
Friulian
medem
(cognate)
→
Ladin
medemo
(cognate)
→
Romansch
medem
(cognate)
→
Romansch
madem
(cognate)