Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
siwen
←
German
sieben
(derived)
←
Proto-Germanic
*sebun
(inherited)
←
Old High German
sibun
(mention)
←
Luxembourgish
(mention)