unavailing 

  1. 形容詞
無益的
無效的, 無用的

    同義字詞
abortive,barren,bootless,empty,fruitless,futile,ineffective,ineffectual,inefficacious,otiose,profitless,unproductive,unprofitable,unsuccessful,useless,vain

例句

  1. But my prayers are unavailing .
  2. But their efforts were unavailing .
  3. My journey was perfectly unavailing .
  4. My efforts have not been unavailing .
  5. Disconsolate, Soapy ceased his unavailing racket.