“Zzz: the onomatopoetry of sleep”
I got this line from The Big Bang Theory. Sheldon says it in episode 8 of season 5. It’s one of the 100 topics from A to Z that he prepared as conversation starters.
In Japanese you could say ぐーぐー (guu guu) for loud snoring. And not only that. There’s
ぐうぐう寝る guu guu neru = to snore fast asleep
すやすや寝る suya suya neru = to sleep soundly and peacefully
うとうと寝る uto uto neru = to nod off, to start to fall asleep
すうすう寝る suu suu neru = to sleep with normal, even breathing
昏昏 kon kon = long, deep sleep
So, what are onomatopoeic words in your native or target language to express the sound of sleep?