Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
þungur
←
Proto-Germanic
*þunguz
(inherited)
←
Old Norse
þungr
(inherited)
→
Icelandic
ofurþungur
(affix)
→
Icelandic
hyggjuþungur
(compound)
→
Icelandic
snjóþungur
(affix)
→
Icelandic
þungbúinn
(compound)