peter out

动词 peter out:

1. end weakly
   同义词：taper off, fizzle out, fizzle
2. use up all one's strength and energy and stop working
   同义词：poop out, run down, run out, conk out

1. The road became narrower and rougher and eventually petered out.
   这条路越来越窄，越来越难走，最后终于消失了。
2. Seeing no future in it, his interest in the job peter out.
   因为看不出有什么前途，他对那件工作的兴趣就日渐低落。