Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
pobi
←
Proto-Brythonic
*pobɨd
(inherited)
←
Proto-Celtic
*kʷokʷeti
(inherited)
←
Proto-Indo-European
*pekʷ-
(root)
←
Proto-Indo-European
*pékʷeti
(derived)
←
Middle Welsh
poby
(inherited)
→
Welsh
popty
(compound)