Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
freagairt
←
Proto-Indo-European
*ǵeh₂r-
(root)
←
Old Irish
frecairt
(inherited)
←
Old Irish
frecra
(mention)
←
Old Irish
frecrae
(mention)
←
Old Irish
fris·gair
(mention)