Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
airbhe
←
Proto-Indo-European
*weh₁y-
(root)
←
Old Irish
airbe
(inherited)
←
Old Irish
ar·fen
(mention)