Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
Tregeriad
←
Breton
Treger
(suffix)
←
Breton
ad
(suffix)
→
Breton
Tregeriadez
(suffix)