impugn       
verb [ T ]  formal uk/ɪmˈpjuːn/ us/ɪmˈpjuːn/
 抨击;质疑
to cause people to doubt someone's character, qualities, or reputation by criticizing them
  Are you impugning my competence as a professional designer? 你是在质疑我作为专业设计师的能力吗? 
 
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