Where does “šešti” come from?

šešti (Proto-Balto-Slavic) comes from Proto-Balto-Slavic šéš, from Proto-Indo-European swéḱs — six.

Ancestry of “šešti”, step by step

StepLanguageWordMeaning
1Proto-Balto-Slavicšéšsix
2Proto-Indo-Europeanswéḱssix
Every word from Proto-Indo-European swéḱs →Every word from Proto-Balto-Slavic šéš →