Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
goddef
←
Proto-Brythonic
*gwoðėβ̃jɨd
(inherited)
←
Proto-Celtic
*uɸodamyeti
(inherited)
←
Proto-Indo-European
*demh₂-
(root)
←
Old Irish
fo·daim
(cognate)
←
Middle Welsh
goðef
(inherited)
→
Welsh
dioddef
(affix)
→
Welsh
goddefedd
(affix)
→
Welsh
goddefgar
(affix)
→
Welsh
goddefiad
(affix)
→
Welsh
goddefol
(affix)
→
Old Irish
fodaim
(cognate)