Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
symud
←
Proto-Brythonic
*sumʉd
(inherited)
←
Latin
summūtō
(derived)
←
Middle Welsh
symut
(inherited)
→
Welsh
symudliw
(affix)
→
Welsh
symudol
(affix)