Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
fëllen
←
German
füllen
(cognate)
←
English
fill
(cognate)
←
Proto-Germanic
*fullijaną
(inherited)
←
Old High German
fullen
(inherited)
←
Icelandic
fylla
(cognate)
←
Dutch
vullen
(cognate)
→
Luxembourgish
afëllen
(prefix)