Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
adbar
←
Proto-Indo-European
*wer-
(root)
←
Old Irish
ad-
(prefix)
←
Old Irish
feraid
(mention)
←
Old Irish
fo·fera
(mention)
→
Irish
ábhar
(inherited)
→
Scottish Gaelic
adhbhar
(inherited)