Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Ridd
←
German
Rüde
(cognate)
←
Old High German
rudo
(derived)
←
Low German
Rööd
(cognate)