Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
dona
←
Proto-Celtic
*dognawos
(inherited)
←
Irish
sona
(mention)
←
Old Irish
dona
(inherited)
→
Irish
donacht
(affix)
→
Irish
donaigh
(affix)
→
Irish
donaire
(affix)
→
Irish
donán
(affix)