Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Dutch
vijftich
←
Proto-Germanic
*fimf tigiwiz
(inherited)
←
Old Dutch
*fīftig
(inherited)
→
Dutch
vijftig
(inherited)