Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Finnish -si
← Proto-Finnic *-ci (inherited)
← Proto-Uralic *-ti (inherited)

→ Finnish -mme (link)
→ Finnish -nne (link)
→ Finnish tapasi (mention)
→ Finnish päällesi (mention)
→ Finnish sinunlaisesi (mention)
→ Karelian -s (cognate)