Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Finnish
viisitoista
←
Finnish
viisi
(affix)
←
Finnish
-toista
(affix)
←
Proto-Finnic
*viici toicta kümmentä
(inherited)
→
Estonian
viisteist
(cognate)
→
Finnish
viisitoistavuotias
(compound)
→
Ingrian
viistoist
(cognate)