Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Bak
←
German
Backe
(cognate)
←
Old High German
backo
(derived)
→
Luxembourgish
Aaschbak
(compound)