Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
fönn
←
Faroese
fonn
(cognate)
←
Old Norse
fǫnn
(derived)
→
Faroese
fonn
(cognate)