The phrase "in nerve" does not actually exist. However, there are synonyms for the word "nerve" that can be used to convey similar meanings. These include "courage," "bravery," "boldness," "fearlessness," "audacity," and "valor." These words all suggest a lack of fear or hesitation in the face of danger or difficulty. They can be used to describe someone who is confident and unafraid in their actions or decisions. Alternatively, words like "anxiety," "stress," "tension," and "nervousness" can be used as antonyms of "in nerve," indicating a state of nervousness or unease.