Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
gar
←
Middle Irish
gerr
(cognate)
←
Old Irish
gar
(inherited)
→
Irish
aice
(link)
→
Irish
gair
(mention)
→
Irish
gar-
(mention)
→
Irish
garathair
(prefix)