fizzle

To sputter or hiss.

• The soda fizzled for several minutes after it was poured.

To decay or die off to nothing; to burn out; to end less successfully than previously hoped.figurativelyinformal

• The entire project fizzled after the founder quit.

To fail to generate the expected yield when exploded during testing.

• The shot fizzled, generating only 200 tons rather than the 30 kilotons they were aiming for.

A spluttering or hissing sound.

Failure of an exploding nuclear bomb to meet its expected yield during testing.

An abortive effort; a flop or dud.

A state of agitation or worry.