Constitution

Noun

1. The act, or process of setting something up, or establishing something; the composition or structure of such a thing; its makeup.
2. The formal or informal system of primary principles and laws that regulates a government or other institutions.
3. A legal document describing such a formal system.
4. A document issued by a religious authority serving to promulgate some particular church laws or doctrines.
5. A person's physical makeup or temperament, especially in respect of robustness.

   "He has a strong constitution, so he should make a quick recovery from the illness."