Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Rack
←
German
Rock
(cognate)
←
Proto-Germanic
*rukkaz
(inherited)
←
Old High German
roc
(inherited)
←
Dutch
rok
(cognate)