Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
verkafen
←
German
verkaufen
(cognate)
←
Old High German
firkoufen
(inherited)
←
Luxembourgish
ver-
(affix)
←
Luxembourgish
kafen
(affix)
←
Dutch
verkopen
(cognate)