Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
Ruvon
→
Breton
Ruvona
(suffix)
→
Breton
Ruvonenn
(suffix)
→
Breton
Ruvonez
(suffix)
→
Breton
Ruvonig
(suffix)