Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
íar
←
Proto-Celtic
*eɸirom
(inherited)
←
Proto-Indo-European
*[[h₁epi]]-rom
(inherited)
→
Irish
ar
(mention)
→
Irish
iar-
(derived)
→
Irish
iarr
(mention)
→
Irish
aniar
(mention)
→
Scottish Gaelic
iar-
(derived)
→
Old Irish
ar
(link)
→
Old Irish
ré
(mention)