Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Hunsrik
rechne
←
Proto-Germanic
*rekanōną
(inherited)
←
Middle High German
rechenen
(inherited)
←
Old High German
rehhanōn
(inherited)
→
German
rechnen
(cognate)
→
Luxembourgish
rechnen
(cognate)