fizzle
fiz-zle
verb
To fail or end weakly after a promising start, losing energy.
"Their ambitious plans fizzled out."
noun
A complete failure or an unsuccessful outcome after a promising start.
"The whole event was a fizzle."
verb
To make a soft hissing or sputtering sound, often dying out.
"The damp firework just fizzled."
Thesaurus
Synonyms: bust, flop, taper off, fizzle out, peter out, hushing, hiss, sibilation, hissing