Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
rof
←
Old English
hrōf
(inherited)
←
Proto-Germanic
*hrōfą
(derived)
→
English
roof
(inherited)
→
Middle English
rofen
(affix)