Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
plethora
←
Ancient Greek
πληθώρη
(derived)
←
Ancient Greek
πλήθω
(affix)
←
Ancient Greek
-η
(affix)
←
Ancient Greek
πληθώρη
(derived(en/la))
←
Proto-Indo-European
*pleh₁-
(root)
→
English
plethoral
(suffix)