Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
amaidecht
←
Middle Irish
ammait
(suffix)
←
Middle Irish
acht
(suffix)
→
Irish
amaideacht
(inherited)
→
Scottish Gaelic
amaideachd
(inherited)