Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Algonquin
cigàg
←
Proto-Algonquian
*šeka·kwa
(inherited)
←
Proto-Algonquian
*šek-
(mention)