Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
tywysog
←
Proto-Celtic
*towissākos
(inherited)
←
Welsh
tywys
(suffix)
←
Welsh
og
(suffix)
→
Welsh
rhi
(link)
→
Welsh
tywysogaeth
(affix)
→
Irish
Taoiseach
(cognate)
→
Irish
taoiseach
(cognate)
→
Old Irish
toísech
(cognate)