Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
esmwyth
→
Welsh
esmwytháu
(affix)
→
Welsh
esmwythder
(affix)
→
Welsh
esmwythyd
(affix)