After working for 36 hours straight, she was completely prostrate by exhaustion.

prostrate 是形容词，来自拉丁语 prosternere（向前扑倒）。pro-表示"向前"，sternere表示"伸展、倒下"。prostrate 形容人"完全精疲力竭而倒下"的状态，常指因极度疲劳或疾病而无法站立或移动。