Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
snigill
←
Proto-Germanic
*snigilaz
(inherited)
←
Old Norse
snigill
(inherited)
→
Icelandic
sniglapóstur
(compound)
→
Icelandic
brekkusnigill
(compound)