Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
prím-
←
Latin
prīmus
(derived)
←
Old Irish
prím
(mention)
→
Irish
príomh-
(inherited)
→
Scottish Gaelic
prìomh-
(inherited)
→
Manx
preeu-
(inherited)