Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
teg
←
Welsh
teg
(cognate)
→
Welsh
teg
(cognate)
→
Cornish
tykki
(mention)
→
Cornish
eglos teg
(affix)
→
Cornish
eglosyow teg
(affix)