Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cynt
←
Proto-Brythonic
*kɨnt
(inherited)
←
Proto-Celtic
*kentus
(inherited)
→
Welsh
cyn
(mention)
→
Welsh
cynnar
(suffix)
→
Welsh
cyntaf
(affix)
→
Welsh
cyntun
(prefix)
→
Welsh
gynnau
(mention)