Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ingrian
yks
←
Estonian
üks
(cognate)
←
Finnish
yksi
(cognate)
←
Proto-Finnic
*ükci
(inherited)
→
Ingrian
yksikkö
(suffix)
→
Ingrian
yksintää
(mention)