Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
samnian
←
Proto-Germanic
*samnōną
(inherited)
→
English
sam
(derived)
→
Old English
samnung
(affix)
→
Old English
gesamnian
(prefix)
→
Old English
tosamnian
(prefix)