Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
chwarae
←
Breton
c'hoari
(cognate)
←
Cornish
gwari
(cognate)
→
Welsh
amchwaraefa
(affix)
→
Welsh
chwaraewr
(affix)