tortuous
The climb up the mountain was tortuous and brutal.
The tortuous climb wore me out.
the two words are not connected; tortuous means suffering and pain.
The U.S. Marine Corps' obstacle course is touted as being quite tortuous. My dental exam was so tortuous that I actually had muscle cramps afterward.
The noun form for the adjective tortuous is tortuousness. Another noun form is torture.
A mountain road is tortuous. My singing is torturous. And when I violate a contract I am being tortious.
severe
twisted vessels
It is an aortic arch with an aneurysm.
stenotic (in medical terms)
It is an aortic arch with an aneurysm.