Asleep (adjective)

1. In a state of sleep.
2. Not awake or conscious.
3. Inactive or dormant.

Origin:

Old english āslep, from ā- (expressing state or condition) + slǣpan "sleep".

Examples:

1. She was fast asleep when I got home.
2. He was sound asleep and didn't hear the noise.
3. The baby was finally asleep after crying for hours.
4. The patient was kept asleep during the surgery.
5. The volcano has been asleep for centuries.