Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
duer-
←
German
dar-
(cognate)
←
Proto-Germanic
*þar
(derived)
←
Old High German
dar
(derived)
←
Luxembourgish
duer
(mention)
→
Luxembourgish
duerhalen
(affix)
→
Luxembourgish
duerleeën
(affix)