Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
proffwyd
←
Proto-Brythonic
*profuïd
(inherited)
←
Ancient Greek
προφήτης
(derived)
→
Welsh
proffwydes
(suffix)