Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
fimtigi
←
Proto-Germanic
*fimf tigiwiz
(inherited)
←
Old Norse
fimm
(suffix)
←
Old Norse
-tigi
(suffix)
→
Danish
femti
(derived)
→
Norwegian Bokmål
femti
(derived)
→
Norwegian Nynorsk
femti
(derived)