What is the worm that will not die mentioned in Mark 9:48?

What is the worm that will not die mentioned in Mark 9:48?

<b>The “worm that does not die” in Mark 9:48 is a way of figuratively depicting the everlasting torment of hell. The horrifying and everlasting nature of hell should encourage believers to share the good news of how Christ saved us from it.</b>