Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cnaipe
←
Old English
cnæp
(derived)
←
Middle Irish
cnap
(inherited)
←
Old Norse
knappr
(derived)
→
Irish
cnaipín
(affix)
→
Irish
cnaipeadóir
(affix)