Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
clúmh
←
Proto-Indo-European
*plew-
(derived)
←
Latin
plūma
(derived)
←
Middle Irish
clúmh
(inherited)
←
Old Irish
clúm
(inherited)
→
Irish
clúmhach
(affix)