obstructer
noun
1 obstructer
Someone who systematically obstructs some action that others want to take.
synonyms: obstructionist, obstructor, resister, thwarter.
Polish: obstrukcjonista
2 obstructer
Any structure that makes progress difficult.
synonyms: impediment, impedimenta, obstruction, obstructor.
Dutch: ballast
Polish: przeszkoda
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