Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
eitur
←
Old Norse
eitr
(derived)
→
English
atter
(cognate)
→
Icelandic
eiturlyf
(mention)
→
Icelandic
eitraður
(mention)
→
Luxembourgish
Eeter
(cognate)