The word "in-disposition" refers to a state of being unwell or not feeling up to par. Its antonyms, on the other hand, denote a state of wellbeing and fullness of energy. Some of the common antonyms of "in-disposition" include wellness, heath, fitness, healthfulness, and soundness. Other antonyms that are synonymous with good health include vitality, strength, robustness, energy, and vigor. A person who is not in a state of in-disposition is one who has a positive attitude towards life and is capable of performing various tasks with ease. Antonyms of "in-disposition" are vital to life as they promote positivity and productivity.