Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
riocht
←
Proto-Celtic
*ɸrixtus
(inherited)
←
Welsh
rhith
(cognate)
←
Proto-Indo-European
*prep-
(inherited)
←
Old Irish
richt
(inherited)
→
Irish
bréagriocht
(affix)
→
Irish
ainriocht
(affix)