Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
-patach
←
Irish
-ach
(affix)
←
Ancient Greek
πάθος
(derived)
→
Irish
hoiméapatach
(affix)
→
Irish
sochapatach
(affix)
→
Irish
síceapatach
(affix)