Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
píosa
←
Gaulish
*pettyā
(derived)
←
Proto-Celtic
*kʷezdis
(derived)
←
Middle English
pece
(derived)
←
Irish
cuid
(doublet)
←
Middle Irish
pissa
(inherited)
→
Irish
cuid
(doublet)