Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Heizkierper
←
German
Heizkörper
(derived)
←
German
heizen
(mention)
←
German
Körper
(mention)
←
Luxembourgish
Kierper
(mention)