Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
grommelen
←
German
grummeln
(cognate)
←
Middle High German
grummen
(derived)
←
Dutch
grommelen
(cognate)