Where does “ôziym” come from?

ôziym (Silesian) comes from Old Polish ośm, from Proto-Slavic osmь, from Proto-Balto-Slavic aśmas, from Proto-Indo-European oḱtṓwos, from Proto-Indo-European oḱtṓw, from Proto-Indo-European aḱ- — sharp, pointed; sharp, pointed, edgy; sharp,...

ôziym (Silesian): eight