Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Elfebeen
←
German
Elfenbein
(derived)
←
Middle High German
helfenbein
(derived)
←
Old High German
helfantbein
(derived)
←
Luxembourgish
Elefant
(compound)
←
Luxembourgish
Been
(compound)
←
Luxembourgish
Elf
(compound)
←
Luxembourgish
Been
(compound)