Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
snjall
←
Proto-Germanic
*snellaz
(inherited)
←
Old Norse
snjallr
(inherited)
→
Icelandic
snilld
(cognate)
→
Icelandic
snjallsími
(affix)
→
Icelandic
snjallúr
(compound)