Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
reachtaíocht
←
Irish
reachtaigh
(suffix)
←
Irish
acht
(suffix)
←
Proto-Indo-European
*h₃reǵ-
(root)
→
Irish
reachtóir
(link)