Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
abhaill
←
Proto-Celtic
*abalnā
(inherited)
←
Irish
úll
(mention)
←
Irish
(mention)
←
Irish
abhall
(mention)
←
Old Irish
aball
(inherited)