Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
reffen
←
German
Reff
(mention)
←
Middle Low German
ref
(derived)
←
Low German
reffen
(derived)
→
English
ripple
(cognate)
→
German
Reff
(link)