Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
gerán
←
Proto-Indo-European
*ǵeh₂r-
(derived)
←
Old Irish
do·gair
(cognate)
→
Irish
gearán
(inherited)
→
Scottish Gaelic
gearan
(inherited)