Wiktionary
imploding
vb. (present participle of implode English)
Usage examples of "imploding".
As before he heard imploding fireballs and felt heat singe his back, and then a blur of green and brown continuing on and on and then his foot coming down, down, down to rest.
Onscreen the core of the imploding world was shrinking again, growing smaller by the second, as if it was trying to suck itself completely out of existence.