nonnervous
/ˌnɑnˈɛrvəs/Definitions
1. adjective
lacking or free from nervousness or anxiety
“After meditation, she became nonnervous and confident in her public speech.”
2. adjective
not caused by or characteristic of nerves or the nervous system
“The nonnervous response to the medicine was a pleasant surprise for the patient.”
3. adjective
not having or showing nervous energy or tension
“The athlete’s nonnervous demeanor gave her teammates confidence in the game.”