Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Rill
←
German
Rille
(cognate)
←
Proto-Germanic
*ril-
(derived)
←
Low German
Rille
(cognate)
←
Dutch
ril
(cognate)