Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
mala
←
Proto-Celtic
*meleti
(inherited)
←
Old Breton
maletic
(inherited)
←
Middle Breton
malaff
(inherited)