Rigidity /(?)/

Ri·gid·i·ty

Rigidity

n.
  1. The quality or state of being rigid; want of pliability; the quality of resisting change of form; the amount of resistance with which a body opposes change of form; -- opposed to flexibility, ductility, malleability, and softness.
  2. Stiffness of appearance or manner; want of ease or elegance.
  3. Severity; rigor. [Obs. orR.]