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