Thread:User talk:Rua/Correct and add stress, please.

https://en.wiktionary.org/wiki/Reconstruction:Proto-Balto-Slavic/pir%C5%A1tas

PBS pĩrštas [with Proto-Balto-Slavic dominant circumflex] > early PS pь̃rstъ [with Proto-Slavic new acute (neoacute) accent] > (Dybo's law) pь̄rstъ̃ > late PS (Ivšić-Stang's law) pь̃rstъ