Determine the part of speech vorpal in this nonsense sentence. The blade went snicker-snack!?

In the sentence "The blade went snicker-snack!?" "vorpal" is not present.

The sentence actually uses "snicker-snack" as an onomatopoeia for the sound of the blade.

The word "vorpal" comes from the poem "Jabberwocky" by Lewis Carroll, where it is used as an adjective, often describing a sword.