Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Zacatlán-Ahuacatlán-Tepetzintla Nahuatl
couatl
←
Classical Nahuatl
coatl
(cognate)
←
Tetelcingo Nahuatl
cohuatl
(cognate)
←
Morelos Nahuatl
kouatl
(cognate)