Polish ser

← English sour (mention)

← Proto-Indo-European *súHros (derived)

← Proto-Slavic *syrъ (derived)

→ Lower Sorbian sera (cognate)

→ Latvian siers (cognate)

→ Polish feta (link)

→ Polish sernik (suffix)

→ Polish serowy (affix)

→ Polish serek (affix)

→ Polish serowar (affix)