Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cnámh
←
Proto-Celtic
*knāmis
(inherited)
←
Proto-Indo-European
*kónh₂m
(inherited)
←
Old Irish
cnáim
(inherited)
→
Irish
mórchnámhach
(affix)
→
Irish
cnámhar
(affix)
→
Irish
cnámhfhear
(affix)