Why does the raven keep saying “Nevermore” in Edgar Allan Poe’s poem?

In Edgar Allan Poe’s poem "The Raven," the bird does not repeat "Nevermore" because it understands the student's questions or possesses inherent wisdom. Instead, the raven’s insistent repetition of the word serves as a harrowing, psychological reflection of the grieving student’s own fears and longing for his lost love, Lenore.12

As the student laments his loss, the raven’s refrain becomes an increasingly painful response to his inquiries, effectively mirroring his descent into despair. Poe, in his essay "The Philosophy of Composition," explained that he crafted the poem with the precision of a mathematical problem, ensuring that the repetition of "Nevermore" would heighten the melancholy atmosphere and the poem's overall emotional impact.12