Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
fadian
←
Proto-Germanic
*fadōną
(inherited)
←
Proto-Germanic
*fadaz
(mention)
←
Proto-Indo-European
*peh₂-
(derived)
→
English
fad
(mention)