Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
sprekker
←
West Frisian
sprekke
(suffix)
←
West Frisian
er
(suffix)
←
Old Frisian
spreker
(inherited)
→
English
speaker
(cognate)