Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
djarfur
←
Proto-Germanic
*derbaz
(inherited)
←
Old Norse
djarfr
(inherited)
→
English
derf
(cognate)
→
Icelandic
djarflegur
(affix)
→
Icelandic
fífldjarfur
(compound)