Where does “prośnisko” come from?

prośnisko (Polish) comes from Polish proso, from Proto-Slavic proso — broomcorn millet.

Ancestry of “prośnisko”, step by step

StepLanguageWordMeaning
1Polishprosopanicgrass, panicum, millet, especially
2Proto-Slavicprosobroomcorn millet
Every word from Proto-Slavic proso →Every word from Polish proso →