Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
mierken
←
German
merken
(cognate)
←
Old High German
merken
(inherited)
←
Dutch
merken
(cognate)
←
Swedish
märka
(cognate)
→
Luxembourgish
bemierken
(affix)