Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
moidyn
←
Irish
maighdean
(cognate)
←
Middle Irish
maigden
(inherited)
→
Manx
moidynys
(affix)