Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
gor-
←
Proto-Brythonic
*gwor-
(inherited)
←
Proto-Celtic
*uɸor-
(inherited)
←
Welsh
gor-
(cognate)
←
Proto-Indo-European
*upér
(inherited)
→
Welsh
gor-
(cognate)