the state of being stiff and unable to bend

कठोरता

English Usage: The hemiplegic rigidity made movement very difficult for him.

Hindi Usage: आधे शरीर के लकवे की कठोरता ने उसके लिए गतिशीलता को बहुत कठिन बना दिया।

a condition characterized by paralysis on one side of the body