Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
digwydd
←
Proto-Celtic
*kēdeti
(inherited)
←
Welsh
di-
(prefix)
←
Welsh
cwyddo
(prefix)
←
Proto-Indo-European
*ḱey-
(derived)
→
Welsh
digwyddiad
(affix)