“临终遗嘱”常见的英文表达是 “last will and testament” 。
“last”强调这是最后的、最终的意愿；“will”本身就有“遗嘱”的意思；“testament”同样表示“遗嘱；遗愿”，二者连用，进一步强调了其作为正式、最终遗愿文件的性质。
例句：He carefully drafted his last will and testament to ensure his assets were distributed according to his wishes.（他仔细地起草了临终遗嘱，以确保自己的资产能按照他的意愿进行分配。）