Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
Käufer
←
German
kaufen
(suffix)
←
German
er
(suffix)
←
Dutch
koper
(cognate)
→
German
Käuferin
(suffix)