Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Dëppen
←
German
Topf
(cognate)
←
Old High German
duppen
(inherited)
→
German
zerdeppern
(cognate)