Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
dòrn
←
Proto-Celtic
*durnos
(inherited)
←
Welsh
dwrn
(cognate)
←
Old Irish
dorn
(inherited)
→
Scottish Gaelic
dòrnag
(affix)
→
Scottish Gaelic
dòrnan
(suffix)