Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
chwys
←
Proto-Celtic
*swissos
(inherited)
←
Proto-Indo-European
*sweyd-
(root)
←
Proto-Indo-European
*sweyd-
(derived)
←
Middle Welsh
chuis
(inherited)
→
Welsh
chwyslyd
(suffix)
→
Welsh
cochwys
(compound)