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Noun: obstructer  ub'strúk-tu(r)
  1. Someone who systematically obstructs some action that others want to take
    - obstructionist, obstructor, resister, thwarter
  2. Any structure that makes progress difficult
    - obstruction, obstructor, impediment, impedimenta

Derived forms: obstructers

Type of: construction, controversialist, disputant, eristic, structure