Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
herðar
←
Old Norse
herðr
(derived)
→
Finnish
hartia
(cognate)
→
Icelandic
herðatré
(affix)
→
Icelandic
herðablað
(compound)