Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Faroese
tann
←
Proto-Germanic
*sa
(derived)
←
Old Norse
sá
(derived)
←
Old Norse
sjá
(cognate)
→
Faroese
tannlækni
(compound)