Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
sêd
←
Proto-Germanic
*sadaz
(inherited)
←
Old Frisian
sed
(inherited)
→
Old English
sæd
(cognate)
→
West Frisian
sêdzje
(affix)