Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
athrach
←
Irish
aithearrach
(link)
←
Irish
áthrach
(link)
←
Old Irish
aitherrach
(inherited)
←
Old Irish
ad·eirrig
(mention)