Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
enginn
←
Old Norse
enginn
(derived)
←
Old Norse
engi
(mention)
←
Old Norse
eingi
(mention)
←
Old Norse
einn
(mention)
←
Old Norse
-gi
(mention)
→
Icelandic
menga
(mention)