Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Elfdalian
dar
←
Proto-Germanic
*þar
(inherited)
←
Old Norse
þar
(inherited)
←
Swedish
där
(cognate)
→
Elfdalian
tast
(mention)