However, you can use phrases like:
* Sleepily - to describe an action done in a sleepy way.
* Soundly - to describe sleeping deeply.
* Restfully - to describe sleeping peacefully and comfortably.
For example:
* "He walked sleepily to his room."
* "The baby slept soundly all night."
* "She drifted off to sleep restfully."
You can also use adverbs like quietly, peacefully, deeply, etc., to describe how someone is sleeping.