Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*enter
→
Breton
etre
(inherited)
→
Gaulish
enter
(inherited)
→
Irish
eitre
(mention)
→
Old Irish
eter
(inherited)
→
Old Irish
etar-
(inherited)