Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
uncuþ
←
Old English
un-
(affix)
←
Old English
cūþ
(affix)
←
Proto-Germanic
*unkunþaz
(inherited)
←
Proto-Indo-European
*ǵneh₃-
(root)