Definitions

1. adjective

lacking a sense of nervousness or anxiety; calm and composed

“The coach helped the team to stay unnervous during the big game.”

2. adjective (of a situation)

unlikely to cause nervousness or anxiety; reassuring

“The calm and peaceful surroundings made the environment unnervous for a good night’s sleep.”

3. noun (rare)

a state of being calm and composed

“The unnervousness of the crowd was palpable before the concert started.”