constitutional

Belonging to, or inherent in, the constitution or structure of one's body or mind.

a constitutional infirmity   constitutional ardour or dullness

For the benefit of one's constitution or health.

a constitutional walk

Relating to the constitution or composition of something; essential, fundamental.

Relating to a legal or political constitution (“the basic law of a nation or institution; the formal or informal system of primary principles and laws that regulates a government or other institution”).

a constitutional right   constitutional reforms

Brexit has rocked the foundations of the nation and plunged everyone into a state of heightened constitutional anxiety.

In compliance with or valid under a legal or political constitution.

The Supreme Court ruled against the applicant and found the statute constitutional.

Thai charter court rules that only heterosexual marriages are constitutional: Same-sex marriage in Thailand will have to wait, as the Constitutional Court ruled unanimously today (Wednesday) that Section 1448 of the Civil and Commercial Code, defining marriage as being a union between a man and a woman, is constitutional.

Something that aids or fosters one's constitution (health):

Moments of potential transcendence, such as an afternoon constitutional through an expressionistic wonderland recalling the Fuji Velvia vividness of What Dreams May Come, ring false in light of this project's mercenary origins.

it was then still just possible to have a relatively normal life at the family’s 25-bedroom mansion at 145 Piccadilly, from where the baby was taken for a two-hour constitutional in her pram to Hyde Park and back every day by her governess.

Something that aids or fosters one's constitution (health):

morning constitutional

For Mac McCrary and me, the Tet Offensive of 1968 begins as we sit in the outhouse. Since things are in such disorder, sergeants have been invited to use the officers' facility. We both arrive at the latrine at the same time to take a constitutional.