Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
gomme
←
Old English
guma
(inherited)
←
Old English
gōma
(inherited)
→
English
gum
(inherited)
→
Middle English
gome
(alter)
→
Middle English
gome
(alter)
→
Middle English
gumme
(alter)