Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
defnydd
←
Proto-Celtic
*damnyos
(inherited)
←
Irish
damhna
(cognate)
→
Welsh
defnyddio
(affix)
→
Welsh
defnyddiol
(suffix)