Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Réck
←
German
Rücken
(cognate)
←
English
ridge
(cognate)
←
West Frisian
rêch
(cognate)
←
Proto-Germanic
*hrugjaz
(inherited)
←
Old High German
rucki
(inherited)
←
Icelandic
hryggja
(cognate)
←
Dutch
rug
(cognate)
→
Luxembourgish
zeréck
(prefix)
→
Luxembourgish
Réckstrank
(compound)