Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
eachtrach
←
Irish
cluas eachtrach
(link)
←
Irish
gnóthaí eachtracha
(link)
←
Irish
eachtra
(affix)
←
Irish
-ach
(affix)
←
Old Irish
echtar
(derived)