Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
llall
←
Proto-Celtic
*alyos
(inherited)
←
Welsh
arall
(mention)
←
Proto-Indo-European
*ályos
(inherited)
→
Welsh
hyn a'r llall
(compound)