Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
reuen
←
Proto-Germanic
*hrewwaną
(inherited)
←
Middle High German
(inherited)
←
Proto-West Germanic
*hreuwan
(inherited)
←
Old High German
(inherited)
→
German
bereuen
(prefix)
→
German
gereuen
(prefix)
→
Alemannic German
rüüwe
(cognate)
→
Luxembourgish
reien
(cognate)