Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
þornig
←
Old English
þorn
(affix)
←
Old English
-iġ
(affix)
←
Proto-West Germanic
*þornag
(inherited)