Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
daf
←
German
taub
(cognate)
←
English
deaf
(cognate)
←
Proto-Germanic
*daubaz
(derived)
←
Old High German
toub
(mention)
←
Icelandic
daufur
(cognate)
←
Dutch
doof
(cognate)
→
Luxembourgish
Dafheet
(suffix)
→
Luxembourgish
dafstomm
(compound)