Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Cathar
←
Ancient Greek
καθαρός
(derived)
→
English
Catharist
(suffix)
→
English
Catharism
(suffix)
→
German
Ketzer
(cognate)
→
Swedish
kättare
(cognate)