USAGE NOTE 用法说明: conscious
The usual opposite word for the adjective conscious is unconscious. 形容词 conscious 的反义词通常为 unconscious:
The driver is still unconscious following the accident earlier this afternoon. 今天下午早些时候的事故发生之后，司机仍神志不清。
However, the opposite of the noun conscious in psychology can either be subconscious or unconscious. Don't confuse conscious with conscientious. Conscious means 'awake and able to think'. 然而在心理学中，名词 conscious 的反义词可以是 subconscious 或 unconscious。不要混淆 conscious 和 conscientious, 前者的意思是“醒着并能思考”:
She is still not conscious after the operation. 手术后她仍没有清醒。
Conscientious means 'very careful and hard-working in the way you do your work'. conscientious 的意思是“尽职尽责的”:
a quiet conscientious student 一个文静而勤奋的学生