Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
tugur
←
Proto-Germanic
*teguz
(inherited)
←
Old Norse
tigr
(inherited)
←
Old Norse
tegr
(mention)
←
Old Norse
tøgr
(mention)
→
Icelandic
áratugur
(compound)
→
Icelandic
tugþraut
(compound)