Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
dyweddïo
←
Welsh
dyweddi
(affix)
←
Welsh
-o
(affix)
←
Proto-Indo-European
*gʷʰedʰ-
(root)
→
Welsh
dyweddïad
(affix)