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