coup de grâce

剑桥词典

an action that ends something that has been gradually getting worse , or that kills a person or animal in order to end their suffering
致命一击；（为免除人或动物的痛苦而给予的）慈悲一击
Jane's affair was the coup de grâce to her disintegrating marriage . 简的婚外情终结了她本已破碎的婚姻。 返回 coup de grâce