Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
kynni
←
Proto-Germanic
*kunþiją
(inherited)
←
Old Norse
kynni
(inherited)
→
Icelandic
skyndikynni
(prefix)