Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
meginherr
←
Proto-Indo-European
*ker-
(root)
←
Proto-Indo-European
*megʰ-
(root)
←
Old Norse
megin
(compound)
←
Old Norse
herr
(compound)