Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
aacht
←
German
acht
(derived)
←
Proto-Germanic
*ahtōu
(derived)
←
Old High German
ahto
(derived)
←
Proto-Indo-European
*oḱtṓw
(derived)
←
Luxembourgish
(mention)
←
Luxembourgish
uechtzéng
(mention)
→
Luxembourgish
Aachtel
(suffix)
→
Luxembourgish
Aachtel
(compound)