Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
reenen
←
German
regnen
(cognate)
←
English
rain
(cognate)
←
Old High German
reganōn
(inherited)
←
Dutch
regenen
(cognate)