Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
rau
←
German
rau
(cognate)
←
English
rough
(cognate)
←
West Frisian
rûch
(cognate)
←
Proto-Germanic
*rūhaz
(inherited)
←
Middle High German
rūhe
(inherited)
←
Old High German
rūh
(inherited)
←
Dutch
ruig
(cognate)