Answer:
"Woman wailing".
Explanation:
Alliteration is the literary device or technique employed by writers in their works. It is the repetition of the same consonant sound or the beginning words of the sentence consecutively or in close proximity. In the lines "As e’er beneath a waning moon was haunted / By woman wailing for her demon-lover!,” the alliteration occurs in the words "woman wailing", with the two words having the same "w" in their beginning and being together next to each other.
