Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
swīþan
→
Old English
oferswiþan
(prefix)
→
Old English
forswiþan
(prefix)
→
Old English
geswiþan
(prefix)