Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ficheall
←
Welsh
gwyddbwyll
(cognate)
←
Old Irish
fidchell
(inherited)
→
Welsh
gwyddbwyll
(cognate)
→
Irish
fichillín
(suffix)
→
Irish
ficheallaí
(affix)