with obj.
1- prevent (someone) from accomplishing something反对, 阻挠; 使受挫折：
he never did anything to thwart his father
他从来没有阻挠过他父亲
he was thwarted in his desire to punish Uncle Fred.
他想惩罚弗雷德大叔的欲望受阻。
1.1
- oppose (a plan, attempt, or ambition) successfully挫败（计划、企图或野心）：
the government had been able to thwart all attempts by opposition leaders to form new parties.
政府成功地挫败了反对派领导人组成新党的一切企图。
- a structural crosspiece forming a seat for a rower in a boat横坐板; 划手座。
- archaic or poetic/literary from one side to another side of; across〈古或诗/文〉横跨（地）; 横过（地）：
as prep. a pink-tinged cloud spread thwart the shore.一道粉红的云彩横跨岸两边。
词源
Middle English thwerte, from the adjective thwert 'perverse， obstinate， adverse'， from Old Norse thvert, neuter of thverr 'transverse'， from an Indo-European root shared by Latin torquere 'to twist'.