Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
soiscéal
←
Proto-Indo-European
*sekʷ-
(root)
←
Middle Irish
*soiscél
(inherited)
→
Irish
soscéala
(mention)
→
Irish
soiscéalaigh
(mention)