Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cymdeithas
←
Welsh
(mention)
←
Welsh
cydymaith
(affix)
←
Welsh
-as
(affix)
→
Welsh
cymdeithasol
(affix)