Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
eistedd
←
Proto-Celtic
[[*exs|*exs-]][[*dī|dī-]][[*sedeti|sedeti]]
(inherited)
←
Proto-Indo-European
*sed-
(derived)
→
English
eisteddfod
(affix)
→
Welsh
eisteddfod
(affix)
→
Welsh
eisteddle
(affix)