Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cydweithio
←
Welsh
cyd-
(affix)
←
Welsh
gweithio
(affix)
→
Welsh
cydweithiad
(affix)
→
Welsh
cydweithiwr
(affix)