Calm
Definitions
Not showing or feeling nervousness, anger, or other strong emotions.
A period or condition of freedom from disturbance, agitation, or strong wind.
To make or become tranquil and quiet.
Examples
She took a deep breath to stay calm before the big presentation.
The lake was perfectly calm under the moonlight.
It is important to remain calm during an emergency.
Synonyms
serene tranquil peaceful placid composed collected untroubled