Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Dutch
stug
←
Middle Dutch
stugge
(inherited)
→
Afrikaans
stug
(inherited)
→
Danish
styg
(cognate)
→
Dutch
stugheid
(suffix)