thwart
/θwɔ:t; θwɔrt/ v[Tn]
prevent (sb) doing what he intends; oppose (a plan, etc) successfully 阻挠（某人）成事; 阻止（计画等）实现
He was thwarted (in his aims) by bad luck. 他运气不好, 未能达到目的.
thwarted ambitions 受挫折无法实现的抱负.
thwart / θwɔ:t; θwɔrt/ n seat across a rowing-boat for an oarsman （划艇上桨手的）坐板.