petered out

“If Trump had ‘momentum’ in October, it has now petered out in November,” Silver wrote.

Gluesenkamp Perez’s roundabout response — about respecting people who do manual labor, building community — petered out in a small sigh.

Things kind of petered out, and then all of a sudden the Cold War is ramping up, and we're scared again, and the CIA needs a little more leverage and a little more power, maybe a little more freedom of movement.

The morning rush had petered out.

Samantha says West Mercia Police initially updated her on developments but, after about six months, communication petered out and her efforts to make contact went unanswered.