Old East Slavic

Noun

песъ ‎(pesŭ) m

1. Alternative form of пьсъ ‎(pĭsŭ)

References

• Sreznevskij, I. I. (1902), “песъ”, in Materialy dlja slovarja drevne-russkago jazyka po pisʹmennym pamjatnikam [Materials for the Dictionary of the Old Russian Language According to Written Monuments] (in Russian), volume 2, Saint Petersburg: Imperial Academy of Sciences, page 1778