Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cynllunio
←
Welsh
cynllun
(suffix)
←
Welsh
-io
(suffix)
←
Welsh
cyn-
(prefix)
←
Welsh
llunio
(prefix)