Petered

I had a lot of gumption when I was young, but now it seems to have all petered out.

Tom's Bible reading group petered out after a few months through lack of interest.

The initial momentum has already petered out.

Our relationship eventually petered out.

In the 19th century, there was a hospital in New York City devoted exclusively to fistula treatment. It closed 100 years ago when cases of fistula petered out.