Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Faroese
skera
←
Proto-Germanic
*skeraną
(derived)
←
Proto-Indo-European
*(s)ker-
(derived)
←
Old Norse
skera
(derived)
→
Faroese
umskera
(mention)