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Grunge, a subgenre of alternative rock, is commonly associated with Nirvana. This genre emerged in the late 1980s and early 1990s, characterized by its raw, distorted sound, introspective lyrics, and themes of alienation and angst. Nirvana's music, particularly their hit album "Nevermind," epitomized the grunge aesthetic, with its heavy guitars, introspective lyrics, and raw emotional intensity.