Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
þarfna
←
Proto-Indo-European
*terp-
(root)
←
Old Norse
þǫrf
(mention)
→
Old Norse
þarfnan
(suffix)