Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
bezañ
←
Proto-Celtic
*butā
(inherited)
←
Welsh
bod
(cognate)
←
Proto-Indo-European
*bʰuH-
(derived)
←
Cornish
bos
(cognate)
←
Old Breton
[[bout]], [[bud]], [[but]]
(inherited)
→
Breton
gouzout
(mention)