ineffective 

  1. 形容詞
無效率的, 無效果的
無效的, 不起作用的
無能的
不靈的
ineffective against ...(人事物):
對抗...無效的
ineffective in ...(動詞ing ...):
對做...無效的

    同義字詞
counterproductive,feckless,hamstrung,ineffectual,inefficacious,inefficient,inexpedient
abortive,barren,bootless,empty,fruitless,futile,ineffectual,inefficacious,otiose,profitless,unavailing,unproductive,unprofitable,unsuccessful,useless,vain

例句

  1. Treatment has been ineffective so far.
  2. However, the measures proved to be ineffective .
  3. Low doses are ineffective at preventing disease.
  4. Those measures may still be largely ineffective .
  5. You don't get big by putting out ineffective adds.