Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
South Slavey
gah
←
Proto-Athabaskan
*GaX
(inherited)
←
Proto-Na-Dene
*GaX
(inherited)
→
Navajo
gah
(cognate)