Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*andadōną
→
English
undo
(inherited)
→
English
undone
(mention)
→
English
undoing
(mention)
→
Old English
ondon
(inherited)