(1):

(n.) Severity; rigor.

(2):

(n.) 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.

(3):

(n.) Stiffness of appearance or manner; want of ease or elegance.