Each time the raven says never the speaker is reminded of the finality of his loss, and the word becomes a symbol of his emotional state. The repetition of the word creates a haunting and melancholic atmosphere, reinforcing the speaker's deep sorrow and the feeling that his life will be forever marked by this loss.
The emotional state of despair is further emphasized by the setting of the poem, which takes place on a cold and stormy night. The use of the word "nevermore" reflects the speaker's belief that he will never escape from his grief and the haunting memory of Lenore.
Thus, the word "nevermore" is closely linked to the emotional state of the speaker at the end of the poem, embodying his profound sorrow and the sense of permanent loss that he experiences after losing his beloved.