Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cymysg
←
Proto-Celtic
*miskos
(inherited)
←
Welsh
cyn
(prefix)
←
Welsh
mysg
(prefix)
→
Welsh
cymysgedd
(affix)
→
Welsh
cymysglyd
(affix)