Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Hunsrik
de
←
Proto-Germanic
*sa
(derived)
←
Middle High German
der
(inherited)
←
Old High German
der
(inherited)
←
Old High German
ther
(mention)
→
Hunsrik
tunkelheet
(cognate)