Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
zerfallen
←
German
zer
(prefix)
←
German
fallen
(prefix)
→
Old English
tofeallan
(cognate)
→
German
Zerfall
(back-formation)