Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Zacatlán-Ahuacatlán-Tepetzintla Nahuatl
tlacatl
←
Proto-Nahuan
*tlaakatl
(inherited)
←
Proto-Uto-Aztecan
*taka
(inherited)
→
Central Huasteca Nahuatl
tacat
(cognate)