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