Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Estonian
tuhk
←
Proto-Finnic
*tuhka
(inherited)
→
Finnish
tuhka
(cognate)
→
Ingrian
tuhka
(cognate)