Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gwiw
←
Proto-Celtic
*wesus
(inherited)
←
Proto-Indo-European
*h₁wésus
(inherited)
←
Sanskrit
वसु
(cognate)
←
Old Irish
fíu
(cognate)
←
Middle Welsh
gwiw
(inherited)
→
Welsh
clodwiw
(affix)
→
Old Irish
fíu
(cognate)