Translation

意識を失った / 意識不明の / 無意識の

Meaning

Unconscious most often means not awake and not able to respond because of injury, illness, sleep, or anesthesia. It is stronger than asleep because awareness is absent. Do not confuse it with subconscious, which describes hidden mental processes.

Examples

• 事故の後、彼は数分間意識を失っていました。
  He was unconscious for several minutes after the accident.
• 患者は手術中、麻酔で意識がありませんでした。
  The patient was unconscious under anesthesia during the operation.