The word "un-fitnesses" refers to a lack of physical or mental fitness. The antonyms for "un-fitnesses" include fitness, health, strength, and wellness. These words describe a state of being physically and mentally sound, with good levels of strength, energy, and overall well-being. Fitness can refer to exercise and a healthy diet, while health refers to overall physical and mental health. Strength can be physical or mental, and wellness includes a range of factors, such as emotional and spiritual well-being. By striving for these antonyms of un-fitnesses, individuals can improve their quality of life and live healthier, more fulfilling lives.