Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*druknaz
→
German
trocken
(inherited)
→
Luxembourgish
dréchen
(inherited)
→
Luxembourgish
dréchen
(mention)