Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
arsaid
←
Proto-Celtic
*ɸarstātis
(inherited)
←
Proto-Indo-European
*steh₂-
(root)
←
Proto-Indo-European
*per-
(inherited)
←
Proto-Indo-European
*steh₂-
(mention)
→
Irish
ársa
(inherited)
→
Scottish Gaelic
àrsaidh
(inherited)
→
Old Irish
arsidetu
(affix)