名詞 obstructionist:

1. someone who systematically obstructs some action that others want to take
   同義詞：obstructor, obstructer, resister, thwarter

ob.struc.tion.ist

n.（名詞）
One who systematically blocks or interrupts a process, especially one who attempts to impede passage of legislation by the use of delaying tactics, such as a filibuster.
蓄意阻撓者：有步驟地阻礙或打斷進(jìn)程的人，尤其是借助一些拖延策略（如阻撓議事），意在阻礙提案通過

【引伸】
obstruc.tionism
n.（名詞）
obstruc.tionis.tic
adj.（形容詞）