Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
romham
←
Middle Irish
[[remum]], [[róm]], [[rium]]
(inherited)
←
Old Irish
reum
(inherited)
→
Irish
romhamsa
(affix)