Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
gisokian
←
Proto-Germanic
*gasōkijaną
(inherited)
←
Old Saxon
gi
(prefix)
←
Old Saxon
sōkian
(prefix)