Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
éirgid
←
Proto-Celtic
*regeti
(inherited)
←
Proto-Indo-European
*h₃réǵeti
(inherited)
←
Proto-Indo-European
*h₃reǵ-
(derived)
←
Old Irish
at·reig
(inherited)
→
Irish
éirigh
(inherited)
→
Scottish Gaelic
èirich
(inherited)
→
Manx
irree
(inherited)