Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
foussen
←
German
fußen
(derived)
←
Luxembourgish
Fouss
(suffix)
←
Luxembourgish
-en
(suffix)
→
German
fußen
(cognate)