Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Acheron
←
English
Acherontic
(link)
←
English
Cocytus
(link)
←
English
Eridanos
(link)
←
English
Lethe
(link)
←
English
Phlegethon
(link)
←
English
Styx
(link)
←
Ancient Greek
Ἀχέρων
(derived)
←
Ancient Greek
ἄχος
(mention)
←
Ancient Greek
ῥέον
(mention)
←
Latin
Acheron
(borrowed)
→
English
Acheronian
(suffix)