The phrase "are on pins and needles" refers to an anxious state of mind. Antonyms for this expression could be calm, relaxed, comfortable or at ease. If someone is not on pins and needles, they are in a state of peace and tranquility where there is no anxiety or fear. They could be described as being composed and collected, with no worries or concerns troubling them. By being at peace, one can enjoy some simple pleasures of life and approach tasks with a clear mind. Being relaxed can provide the necessary space for creativity while maintaining a clear focus. Ultimately, the antonyms of "are on pins and needles" offer a sense of comfort and stability to an otherwise anxious state of mind.