Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*wēdeti
→
Irish
inis
(derived)
→
Old Irish
adfét
(inherited)
→
Old Irish
doadbat
(inherited)
→
Old Irish
asindet
(derived)