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1. End weakly
   "The music just petered out--there was no proper ending";
   - taper off, fizzle out, fizzle
    
2. Use up all one's strength and energy and stop working
   "At the end of the march, I petered out";
   - poop out [N. Amer, informal], run down, run out, conk out [informal]

Derived forms: peters out, petering out, petered out

Type of: discontinue, fatigue, jade, pall, tire, weary