Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
fasta
←
Proto-Germanic
*fastāną
(derived)
←
Icelandic
föstudagur
(link)
←
Old Norse
fasta
(derived)
←
Old Norse
fasta
(derived)
→
Icelandic
föstudagur
(compound)