unconsciousness
n. 无意识；意识不清；[医] 人事不省
例句
He had lapsed into unconsciousness.
他陷入了昏迷状态。
《牛津词典》
He knew that he might soon lapse into unconsciousness.
他知道他可能很快就会陷入昏迷状态。
《柯林斯英汉双解大词典》
The injured man tried to speak but soon drifted into unconsciousness.
受伤的男人想说点什么，但一会儿就不省人事了。
