stone·wall /ˈston ˌwɔl/
 (vi.)慎重的打球,小心翼翼地打球,妨礙或阻礙


 stonewall
      v 1: obstruct or hinder any discussion; "Nixon stonewalled the
           Watergate investigation"; "When she doesn't like to face
           a problem, she simply stonewalls"
      2: engage in delaying tactics or refuse to cooperate; "The
         President stonewalled when he realized the plot was being
         uncovered by a journalist"