The antonyms for the term "beating breast" are calm, peaceful, and relaxed. When one is calm, they have a sense of serenity and tranquility, without any agitation or unrest. Being peaceful means having a sense of harmony and quietness, without any conflict or disturbance. Relaxation refers to a state of comfort and ease, without any tension or stress. These antonyms provide a contrast to the term "beating breast," which is typically used to describe a state of anxiety, fear, or alarm. By embracing a calm, peaceful, and relaxed attitude, one can find a way to manage their emotions and navigate challenging situations with poise and grace.