Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
dor
←
Proto-Indo-European
*dʰeǵʰ-
(root)
←
Proto-Indo-European
*dʰeǵʰ-
(inherited)
→
Cornish
dorg
(mention)
→
Cornish
porhel dor
(affix)