derogcome to an end unsettled; conclude without conclusion; end up with nothing conclusive; end up with nothing settled
The investigation fizzled out.
The problem won't just disappear.
This is a very important problem, but he just sleeps on it.
He can do nothing for it but to let the matter rest.
Prosecution of the case fizzled out for lack of conclusive evidence.
The campaign petered out for lack of support.
Our romance just fizzled out.
The problem should be put aside.