Obstructionist
Pronunciation : Ob*struc"tion*ist
Part of Speech : n.
Definition : Defn: One who hinders progress; one who obstructs business, as in a legislative body. -- a.
Defn: Of or pertaining to obstructionists. [Recent]
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder