Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
-gamacht
←
Irish
-acht
(affix)
←
Ancient Greek
γάμος
(derived)
→
Irish
homagamacht
(affix)
→
Irish
agamacht
(affix)
→
Irish
ainiseagamacht
(affix)
→
Irish
apagamacht
(affix)