Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cyfaill
←
Proto-Celtic
*komaltyos
(inherited)
←
Proto-Celtic
*kom-
(prefix)
←
Proto-Celtic
*alt-
(prefix)
←
Proto-Indo-European
*h₂el-
(inherited)
→
Welsh
cyfeilles
(affix)
→
Welsh
cyfeillgar
(affix)