A bundle of nerves is a phrase used to describe someone who is anxious, tense, or extremely nervous. Antonyms for this phrase include words like calm, peaceful, and relaxed. When someone is not a bundle of nerves, they may be described as being composed, tranquil, or serene. They may appear collected, poised, or even carefree. These individuals are not easily rattled by stressful situations and can maintain a steady demeanor, even when things get tough. By practicing relaxation techniques or cultivating a positive mindset, it is possible to minimize feelings of nervousness and cultivate a more tranquil state of being.