Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
enep
←
Proto-Brythonic
*ėnib
(inherited)
←
Proto-Celtic
*enīkʷos
(inherited)
→
Welsh
wyneb
(cognate)