Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
wythfed
←
Proto-Brythonic
*üɨθβ̃ed
(inherited)
←
Proto-Celtic
*oxtūmetos
(inherited)
←
Welsh
wyth
(affix)
←
Welsh
-fed
(affix)
→
Welsh
wythfed ar hugain
(compound)