Rigor

Rigidity; stiffness.

A sense of chilliness, with contraction of the skin; a convulsive shuddering or tremor, as in the chill preceding a fever.

The becoming stiff or rigid; the state of being rigid; rigidity; stiffness; hardness.

See 1st Rigor, 2.

Severity of climate or season; inclemency; as, the rigor of the storm; the rigors of winter.

Stiffness of opinion or temper; rugged sternness; hardness; relentless severity; hard-heartedness; cruelty.

Exactness without allowance, deviation, or indulgence; strictness; as, the rigor of criticism; to execute a law with rigor; to enforce moral duties with rigor; -- opposed to lenity.

Severity of life; austerity; voluntary submission to pain, abstinence, or mortification.

Violence; force; fury.

the quality of being valid and rigorous

something hard to endure; "the asperity of northern winters"