unimpeachable [ˌʌnɪmˈpitʃəbəl]

例句:

• evidence from an unimpeachable source
  来源可靠的证据
  
• When toned down again , the unimpeachable patriot appeared in the witness - box.
  这阵喧哗过去, 那无懈可击的爱国志士已经登上了证人席.
  
• He said all five were men of unimpeachable character.
  他说这五个都是品格完美无缺的人。
  
• Is there any source of information that is unimpeachable?
  来自SA
• It is essential that the case is processed with unimpeachable fairness and due process.
  来自THETIMES