Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
srón
←
Proto-Celtic
*srognā
(inherited)
←
Welsh
ffroen
(cognate)
←
Old Irish
srón
(inherited)
→
Irish
srónach
(affix)
→
Irish
mórshrónach
(affix)