Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gradd
←
Proto-Brythonic
*grað
(inherited)
←
Welsh
gris
(doublet)
←
Latin
gradus
(derived)
←
Middle Welsh
grað
(inherited)
→
Welsh
gris
(doublet)
→
Welsh
cydradd
(prefix)
→
Welsh
graddfa
(affix)
→
Welsh
cynradd
(affix)
→
Welsh
cyfradd
(affix)
→
Welsh
canolradd
(compound)
→
Welsh
uwchradd
(affix)
→
Welsh
graddio
(affix)