noun
tranquility
trang-KWIL-uh-tee/træŋkwˈɪlɪti/
A peaceful, calm, and undisturbed state.
The motionless hammock and calm water create a scene of tranquility.

Etymology
The ending makes calmness a state or quality. Early uses covered both peace in a realm or community and serenity within a person, joining public quiet with inward composure.
In context
this picture represents inner Tranquility a sense of peace and calmness
More examples
- A passing truck breaks the tranquility of the morning.
- A few deep breaths help him regain a sense of tranquility.
- Visitors come to the mountains in search of tranquility.
Forms
tranquility
tranquil adjective — Peaceful, calm, and free from disturbance.
tranquilize verb — To make someone calm, often using medication.