Knopyt
To disintegrate, possibly while screaming. Coined by Tom Scott in 2015 in his video What Counts As A Word? It later became a meme because he screamed directly afterwards (as part of the example), leading some people to edit the clip so he disappears whilst screaming.
If you accept the definition that a word is some letters surrounded by a gap then knopyt--- *gets thanos snapped out of existence*