半はん醒せい半はん睡すいはんせいはんすいMeanings1nounhalf awake and half asleepyojijukugo (four-character idiom)›A yojijukugo describing a drowsy, in-between state of consciousness, often used in literary or formal contexts.彼かれは半はん醒せい半はん睡すいの状じょう態