Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cuma
←
Proto-Celtic
*komsmiyos
(inherited)
←
Proto-Indo-European
*ḱom
(derived)
←
Proto-Indo-European
*sem-
(mention)
←
Old Irish
cummae
(inherited)
→
Irish
cum
(mention)
→
Irish
anchuma
(affix)