The term "life breath" refers to the essence of life that keeps humans and animals alive. There are several synonyms that can be used to describe this breath of life. One common synonym is "prana," which is a Sanskrit word that refers to the life force that flows through all living things. Another synonym is "chi," which is a Chinese term that refers to the energy that flows through the body. "Vitality" is another common synonym that describes the energy or spirit that gives life to all living things. Lastly, "spirit" is another synonym that refers to the intangible essence of life that makes us who we are.