I see you point. Years ago, someone asked me a similar question and that is, why sound asleep? Off the cuff I replied the “sound” refers to the noise one makes while fast asleep. The snorting sound, ...

英国诗歌和成语中经常押头韵（alliteration），所谓“头韵”是指一连使用两个或更多个以同一字母或同一发音开头的单词。例如：Round the rocks runs the river. Safe and sound就是一个押头韵的英语成语，意思是“安然无恙”。Sound作形容词用，解释为“完好的，健全的 ...