Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
grúdaire
←
Old English
grūt
(derived)
←
Middle Irish
gruadaire
(inherited)
←
Middle Irish
grutt
(mention)
←
Old Irish
scóaire
(mention)
←
Old Irish
scó
(mention)
→
Irish
grúdaigh
(back-formation)
→
Irish
grúdaireacht
(affix)