Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
dligh
←
Proto-Indo-European
*dʰelgʰ-
(root)
←
Old Irish
dligid
(inherited)
→
Irish
dlí
(link)