Where does “Baasn” come from?

Baasn (East Central German) comes from Middle High German bëseme, from Old High German besamo, from Proto-West Germanic besmō, from Proto-Germanic besmô, from Proto-Indo-European bʰés-mō ~ bʰs-m̥nés, from Proto-Indo-European bʰes- — wind; to blow, chew, rub; to rub, grind.

Baasn (East Central German): broom