Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Eastern Huasteca Nahuatl
tomatl
←
Proto-Nahuan
*tomatl
(inherited)
←
Classical Nahuatl
tomatl
(cognate)