"Sleeping" in Engpsh.
The word "sleeping" comes from the verb "sleep", which means to rest the body and mind and to be in a state of unconsciousness.
Examples:
I'm going to sleep now. (我现在要去睡觉了。)
She was sleeping soundly when I left. (我离开时她正在睡得很香。)
He's sleeping on the couch. (他在沙发上睡觉。)