Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
botach
←
Middle Irish
bot
(suffix)
←
Middle Irish
ach
(suffix)
→
Irish
bodach
(inherited)
→
Scottish Gaelic
bodach
(inherited)