Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
dropi
←
Proto-Germanic
*drupô
(inherited)
←
Old Norse
dropi
(inherited)
→
Icelandic
dropi í hafið
(mention)
→
Icelandic
regndropi
(affix)