Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
deem
←
Proto-Germanic
*þammai
(derived)
←
Old High German
themu
(derived)
←
Old High German
demu
(mention)
→
Luxembourgish
deemno
(compound)