Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
slige
←
Proto-Indo-European
*sleyǵ-
(derived)
←
Old Irish
slige
(inherited)
←
Old Irish
sligid
(mention)
→
Irish
slí
(inherited)
→
Scottish Gaelic
slighe
(inherited)