Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Faroese
seg
←
Proto-Germanic
*sek
(derived)
←
Proto-Indo-European
*se
(derived)
←
Old Norse
sik
(derived)
→
Faroese
-st
(cognate)