Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
chwith
←
Proto-Celtic
*(s)kīttos
(inherited)
→
Welsh
de
(link)
→
Welsh
cledd
(link)
→
Welsh
chwith-glicio
(compound)