Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cabhrach
←
Irish
cabhair
(affix)
←
Irish
-ach
(affix)
←
Irish
cabharthach
(alter)
←
Irish
bean chabhrach
(link)
←
Middle Irish
cobarthach
(cognate)