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