Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Westrobothnian
bamm
←
Proto-Germanic
*bagmaz
(inherited)
←
Icelandic
baðmur
(cognate)
←
Old Norse
baðmr
(inherited)
←
Swedish
bagn
(cognate)