Breathes easily is a phrase that describes somebody who inhales and exhales without difficulty. The term can be altered to emphasize different qualities of the breathing process. Some synonyms to consider include free breathing, effortless respiration, and unencumbered inhaling. Relaxed breathing, smooth inhalation, and effortless exhalation can also work well to communicate the same meaning. Additionally, one can use unrestricted respiring, clear breath, and comfortable exhaling. Other synonyms to consider include natural ventilation, easeful inhalation, and effortless air intake. Ultimately, the right synonym for breathes easily will depend on the context being used, including the particular situation and the audience being addressed.