Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
sgeir
←
Danish
skær
(cognate)
←
English
skerry
(cognate)
←
Norwegian Bokmål
skjær
(cognate)
←
Old Norse
sker
(derived)
←
Scots
skerry
(mention)
→
Swedish
skär
(cognate)