Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Rwanda-Rundi
bumba
←
Proto-Bantu
*-bʊ́mba
(inherited)
→
Rwanda-Rundi
umubumbyi
(mention)
→
Rwanda-Rundi
umubumvyi
(mention)