Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
nant
←
Proto-Brythonic
*nant
(inherited)
←
Proto-Celtic
*nantos
(inherited)
←
Proto-Celtic
*nantus
(mention)
←
Welsh
ffrwd
(link)
←
Middle Welsh
nant
(inherited)
→
Welsh
sychnant
(compound)