Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
Ard Machae
←
Old Irish
ard
(compound)
←
Old Irish
Machae
(compound)
→
Irish
Ard Mhacha
(inherited)