Quiescent (adjective)

In a state of rest or inactivity, not showing any movement or activity.

Origin:

From latin word "quiescentem" meaning being at rest or inactive.

Examples:

1. The volcano has been quiescent for many years.
2. I found him in a quiescent state, just lying there and staring at the ceiling.
3. The market was quiescent this morning, with not much trading activity going on.
4. The quiescent lake was reflecting the beautiful sunset.
5. After a long day at work, I like to relax in a quiescent state.