The word 清醒 is formed by combining two characters whose core meanings create a layered, metaphorical concept. 清 (qīng) fundamentally means "clear", as in pure water or lucid air, conveying a sense of unimpeded transparency. 醒 (xǐng) means "to wake up" or "to become conscious", denoting the transition from sleep or unawareness to an alert state. Together, they create a powerful compound where the physical clarity of 清 is applied to the mental state of 醒, metaphorically picturing a mind that is not only awake but also sharp, lucid, and free from confusion, much like clear water after sediment has settled.