Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Coptic
ⲭⲁⲙⲉ
←
Demotic
km
(derived)
→
Coptic
ⲭⲏⲙⲓ
(cognate)