Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Pipil
ijpak
←
Proto-Nahuan
*-(ɨ)kpa-k
(inherited)
←
Classical Nahuatl
icpac
(cognate)