Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
epistolary
←
English
epistle
(mention)
←
French
épistolaire
(borrowed)
←
Ancient Greek
ἐπιστολή
(derived)
←
Ancient Greek
ἐπιστέλλω
(mention)
←
Ancient Greek
ἐπί
(mention)
←
Ancient Greek
στέλλω
(mention)
←
Latin
*epistolarium
(derived)
←
Latin
epistola
(mention)
←
Latin
-arium
(mention)
→
English
epistolarily
(suffix)