強弩之末 [强－－－]

Jyutping koeng4 nou5 zi1 mut6
Pinyin qiáng nǔ zhī mò

Definitions (CC-CEDICT)
  1. lit. an arrow at the end of its flight (idiom)
  2. fig. spent force
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    exhausted strength; spent force; strong force that has been exhausted