Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
kloen
←
German
klagen
(cognate)
←
Proto-Germanic
*klagōną
(inherited)
←
Middle High German
klagen
(inherited)
←
Old High German
klagōn
(inherited)
←
Dutch
klagen
(cognate)
→
Luxembourgish
Klo
(link)