Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Hunsrik
Schlang
←
Proto-Germanic
*slangô
(inherited)
←
Middle High German
slange
(inherited)
←
Old High German
slango
(inherited)
→
Luxembourgish
Schlaang
(cognate)