Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Faroese
tveir
←
Proto-Germanic
*twai
(inherited)
←
Proto-Indo-European
*dwóh₁
(inherited)
←
Old Norse
tveir
(inherited)
→
Icelandic
tveir
(cognate)