Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
serða
←
Proto-Germanic
*serþaną
(inherited)
←
Proto-Germanic
*serþaną
(inherited(is/non))
←
Old Norse
serða
(inherited)