Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Danish
samvær
←
Old English
samwist
(cognate)
←
Danish
sam-
(affix)
←
Danish
være
(affix)
←
Icelandic
samvera
(cognate)
←
Old Norse
-
(cognate)
←
Swedish
samvaro
(cognate)
→
Westrobothnian
samvöru
(cognate)
→
Icelandic
samvera
(cognate)