Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
mjöll
←
Proto-Germanic
*mellō
(inherited)
←
Old Norse
mjǫll
(inherited)
→
Icelandic
Mjallhvít
(mention)