obstructor

ob·struct  (b-strkt, b-)

tr.v. ob·struct·ed, ob·struct·ing, ob·structs

1. To block or fill (a passage) with obstacles or an obstacle. See Synonyms at block.

2. To impede, retard, or interfere with; hinder: obstructed my progress. See Synonyms at hinder¹.

3. To get in the way of so as to hide from sight.

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[Latin obstruere, obstrct- : ob-, against; see ob- + struere, to pile up; see ster-² in Indo-European roots.]

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ob·structer, ob·structor n.

ob·structive adj.

ob·structive·ly adv.

ob·structive·ness n.

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In naval mine warfare, a device laid with the sole object of obstructing or damaging mechanical minesweeping equipment.

Thesaurus

Noun	1.	obstructor - someone who systematically obstructs some action that others want to take obstructer, obstructionist, resister, thwarter controversialist, disputant, eristic - a person who disputes; who is good at or enjoys controversy naysayer - someone with an aggressively negative attitude stonewaller - one who stonewalls or refuses to answer or cooperate; someone who delays by lengthy speeches etc.
	2.	obstructor - any structure that makes progress difficult impedimenta, obstruction, impediment, obstructer bar - an obstruction (usually metal) placed at the top of a goal; "it was an excellent kick but the ball hit the bar" barrier - a structure or object that impedes free movement blockade - prevents access or progress blockage, stoppage, occlusion, closure, block, stop - an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe" hinderance, hindrance, preventative, preventive, encumbrance, incumbrance, interference, hitch - any obstruction that impedes or is burdensome obstacle - an obstruction that stands in the way (and must be removed or surmounted or circumvented) structure, construction - a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons" tumbler - a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown