Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
fortaigh
←
Proto-Indo-European
*steygʰ-
(root)
←
Middle Irish
fortaigid
(inherited)
←
Middle Irish
furtaigid
(mention)
←
Old Irish
for·tét
(derived)
←
Old Irish
fortacht
(mention)