Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Westrobothnian
bḷåi
←
Proto-Germanic
*blahwjǭ
(inherited)
←
Proto-Indo-European
*bʰlok-
(derived)
←
Icelandic
blæja
(cognate)
←
Old Norse
*blœja
(inherited)