Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
eglos
←
Breton
iliz
(cognate)
←
Proto-Brythonic
*egluɨs
(inherited)
←
Welsh
eglwys
(cognate)
←
Latin
ecclēsia
(borrowed)
→
Welsh
eglwys
(cognate)
→
Cornish
eglosyow
(suffix)
→
Cornish
eglos teg
(affix)