Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
oigheann
←
Scottish Gaelic
àmhainn
(cognate)
←
Middle Irish
aigen
(inherited)
→
Irish
gásoigheann
(affix)
→
Scottish Gaelic
àmhainn
(cognate)