Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
tred
←
Middle English
treden
(back-formation)
→
English
tread
(inherited)
→
Middle English
treden
(link)
→
Middle English
treden
(affix)
→
Middle English
tredel
(affix)