impediment-thwart

impediment
a speech impediment
言语障碍
The level of inflation is a serious impediment to economic recovery.
通货膨胀是影响经济复苏的严重障碍。
impede
At no time did I make an attempt to impede any investigatory effort.
我绝没有试图妨碍过任何调查工作。
thwart
She was thwarted in her attempt to take control of the party.
她控制这个政党的企图受阻了。