Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Elfdalian
wattn
←
Proto-Germanic
*watōr
(derived)
←
Proto-Indo-European
*wódr̥
(derived)
←
Old Norse
vatn
(derived)
←
Swedish
vatten
(cognate)