Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
tairngir
←
Proto-Indo-European
*ǵeh₂r-
(root)
←
Middle Irish
tairngirid
(inherited)
←
Old Irish
do·airngir
(inherited)