To intersperse means to sprinkle, or expand something between things, or among things. It also means to place at intervals or spread at intervals, or in between something. When looking at other words that express the same idea as this one, you find that closely related words are interweave, which means interlace something.to insert at intervals. Intersperse is a verb, and it's dictionary meaning is: "scatter among or between other things; place here and there."
The symbolic significance of The raven in the poem is vast.The ebony bird stands as the embodiment of grief caused by loneliness and separation.He stands as a symbol of the loss of the narrator whose heart yearns for his beloved Lenore.The raven represents evil and death. hope this is helpful :)