Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
slat
←
Proto-Celtic
*slattā
(inherited)
←
Welsh
llath
(cognate)
←
Middle Irish
slat
(inherited)
→
Welsh
llath
(cognate)
→
Irish
slatiascaireacht
(affix)