showdown
noun [ C ] uk/ˈʃəʊ.daʊn/ us/ˈʃoʊ.daʊn/
决定胜负的大辩论;摊牌
an important argument that is intended to end a disagreement that has existed for a long time
The president is preparing for a showdown with Republicans over his plans to reform the economy. 总统正在作准备，打算就他的经济改革计划和共和党人最后放手一搏。
Millions of dollars were spent on lawyers in a courtroom showdown between the two companies. 两家公司在法庭的最后一战光在律师身上就花了数百万美元。
Synonym: confrontation