Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
seyrsnys
←
Manx
(suffix)
←
Manx
ys
(suffix)
←
Middle Irish
saírsine
(inherited)
←
Old Irish
saírse
(derived)