Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
andsakan
←
Proto-Germanic
*andasakaną
(inherited)
←
Old Saxon
and-
(affix)
←
Old Saxon
sakan
(affix)
→
English
unsake
(cognate)