The phrase "bite one's nails" describes a nervous and anxious behavior that people display when facing stress or uncertainty. But, there are a lot of antonyms for this phrase that can help someone to relax and remain calm during challenging situations. Examples include "stay composed," "stay relaxed," "remain poised," "keep cool," "keep a level head," "stay unruffled," or "remain unfazed." By adapting these antonyms, individuals can remain focused and composed even during the most stressful times. Therefore, learning these antonyms can help people to overcome nail-biting behavior and stay calm and composed under pressure.