Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
addurn
←
Proto-Brythonic
*aðʉrn
(inherited)
←
Latin
adōrnō
(derived)
←
Middle Welsh
aðurn
(inherited)
→
Welsh
addurno
(affix)