Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
toes
←
Proto-Brythonic
*toɨs
(inherited)
←
Middle Welsh
toes
(inherited)
→
Welsh
surdoes
(compound)
→
Welsh
toesen
(affix)
→
Welsh
toesaidd
(affix)
→
Welsh
toeslyd
(affix)
→
Manx
teayst
(cognate)