This is the 443rd most frequent Persian word.
بارش
"بارش" means "precipitation" (rain, snow, etc.).
In this sentence, 'بارش' is used as a noun to refer to the act or instance of precipitation, specifically rain.
بارش باران باعث شادی کشاورزان شد.
The rain's precipitation caused happiness among the farmers.
Here, 'بارش' is again employed as a noun describing the occurrence of snow falling from the sky.
دیروز در کوه بارش برف سنگینی اتفاق افتاد.
Yesterday, a heavy snowfall occurred in the mountains.
In this case, 'بارش' serves to quantify or describe the expected precipitation in the form of snow.