Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
chuig
←
Irish
chuige
(back-formation)
←
Irish
go
(mention)
←
Old Irish
cuci
(derived)
←
Old Irish
co
(mention)
→
Irish
ag
(mention)