Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
regndropi
←
Proto-Germanic
*regnadrupô
(inherited)
←
Icelandic
regn
(affix)
←
Icelandic
dropi
(affix)
←
Old Norse
*regndropi
(inherited)
→
English
raindrop
(cognate)