Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
af-
←
Proto-Brythonic
*aβ̃-
(inherited)
←
Proto-Celtic
*am-
(inherited)
←
Proto-Celtic
*an-
(mention)
←
Proto-Celtic
(mention)
←
Proto-Celtic
(mention)
→
Welsh
aflwyddiannus
(prefix)
→
Welsh
aflafar
(affix)
→
Welsh
afiach
(affix)
→
Welsh
afreolaidd
(affix)