Grammatical Analysis: "Rivers" as a Noun

"Rivers" is the plural form of the countable noun "river". A river is a natural flowing watercourse, typically freshwater, fed by precipitation, snowmelt, or groundwater, draining into an ocean, lake, or another river. As a plural noun, "rivers" refers to multiple such watercourses (e.g., "The Amazon and Nile are major rivers"). It functions grammatically as a subject, object, or complement in sentences.