Russian перси

← Serbo-Croatian пр̏са (cognate)

← Serbo-Croatian pȑsa (mention)

← Slovak prs (cognate)

← Slovak prsia (mention)

← Proto-Slavic *pьrsь (inherited)

→ Serbo-Croatian prsa (cognate)

→ Serbo-Croatian прса (cognate)

→ Slovak prsia (cognate)