Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*butā
→
Breton
bezañ
(inherited)
→
Welsh
bod
(inherited)
→
Irish
both
(inherited)
→
Old Irish
buid
(inherited)