unable 

  1. 形容詞
不能的, 不會的
不能勝任的, 無能力的
unable to ...(動詞...):
不能做...的
不會做...的
無法做...的
沒有辦法做...的
沒能做...的
無從做...的
無從做...起的

    同義字詞
inapt,incapable,incompetent,inept,inexpert,unfit,unfitted,unqualified,unskilled,unskillful

例句

  1. I was unable to obtain anything of help.
  2. He was now unable to work for the government.
  3. He was unable to find any evidence of such awards.
  4. She was unable to win the title at the Pay Per View.
  5. To our knowledge the court was unable to locate him.