obstructor Definition

obstruct
verb obstructed, obstructing

1. To block or close (a passage or opening, etc).
2. To prevent or hinder the movement or progress of someone or something.

Thesaurus: hinder, restrain, prevent, impede, stop, interfere with, detain, block, occlude, hamper, frustrate, slow down, inhibit, thwart; Antonym: help.
3. To oppose or stand in the way of (a person, a proposition or intention, etc).
4. To block or impede (a view or line of vision, etc).
intr
5. To be or constitute an obstruction.
intr
6. To practise obstructionism.

Derivative: obstructor
noun

Etymology: 16c: from Latin obstruere, from ob- in the way of + struere to pile or build up.