Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
unken
←
German
Unke
(mention)
←
English
unkenned
(back-formation)
←
English
un-
(affix)
←
English
ken
(affix)