Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
open-ers
←
Old English
openears
(inherited)
←
Middle English
open
(affix)
←
Middle English
ers
(affix)
→
English
open-arse
(inherited)