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Noun: stonewaller  'stown,wo-lur [N. Amer], stown'wo-lu(r) or 'stown,wo-lu(r) [Brit]
  1. One who stonewalls or refuses to answer or cooperate; someone who delays by lengthy speeches etc.
    "The politician became known as a stonewaller during the investigation"

Derived forms: stonewallers

Type of: obstructer, obstructionist, obstructor, resister, thwarter