Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
chwydd
←
Proto-Brythonic
*hwuɨð
(inherited)
←
Proto-Celtic
*swēdus
(inherited)
←
Old Irish
síad
(cognate)
←
Middle Welsh
chwyd
(inherited)
→
Welsh
chwyddo
(affix)