Antonyms for the phrase "loses nerve," which means to become timid or hesitant, include words that convey bravery, confidence, or assertiveness. Some antonyms that can be used in place of "loses nerve" are phrases such as being fearless, bold, daring, adventurous, or audacious. These words suggest a sense of courage, determination, and mental toughness, qualities that we often associate with successful individuals who can overcome challenges and obstacles in their lives. Being brave and taking risks are important traits in both our personal and professional lives, and so it is critical to stay confident and firm in our decisions, even when facing difficult situations.