The word "Nish" does not appear to be a recognized English word. It could potentially be a typo or an abbreviation. However, if you meant "Niche," I can provide information on that.
The word "niche" originates from the French word "nicher," which means "to make a nest." It was originally used in a physical context referring to a recess in a wall where a statue or ornament could be placed.
If "Nish" was meant to refer to something else, please provide the correct context or spelling for further assistance.