车祸后他陷入呆滞状态，对外界毫无反应。

After the car accident, he fell into a stupor, unresponsive to anything around him.

stupor 是名词，来自拉丁语 stupor（麻木、迟钝），指一种意识模糊、对外界刺激反应迟钝的状态，介于清醒和昏迷之间。可以理解为"呆滞状态"或"恍惚状态"。