O 開頭單詞
obstructionist n. 妨礙者；蓄意阻撓者 adj. 阻撓議事的；蓄意阻撓的
obstructionism n.妨礙議程的手段；蓄意阻撓
obstruction-guard n.排障器；護欄
obstruction-free 無障礙設(shè)計
obstruction of lacrimal duct [醫(yī)藥科學]淚道阻塞
obstruction of justice 妨礙司法公正；阻礙司法
obstruction cocycle [數(shù)學]障礙閉上鏈
obstruction beacon [航空、航天科學技術(shù)]障礙物立標
obstruction n.障礙；妨礙；閉塞；違例阻擋
obstructing v. 妨礙（obstruct的ing形式）；阻塞
obstructer n.障礙物；攔路虎；起阻礙作用的人=obstructor.
obstructed adj. 阻塞的；梗阻的，不通的 v. 阻塞；妨礙；遮?。╫bstruct的過去分詞形式）
obstruct wilfully 橫加阻梗
obstruct from v. 阻擋