Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
giwerk
←
Old English
geweorc
(cognate)
←
Old Saxon
gi
(prefix)
←
Old Saxon
werki
(prefix)
→
Old English
geweorc
(cognate)