Rigor

1. A sense of chilliness, with contraction of the skin; a convulsive shuddering or tremor, as in the chill preceding a fever.
2. The becoming stiff or rigid; the state of being rigid; rigidity; stiffness; hardness.
3. Severity of life; austerity; voluntary submission to pain, abstinence, or mortification.
4. Stiffness of opinion or temper; rugged sternness; hardness; relentless severity; hard-heartedness; cruelty.
5. Rigidity; stiffness.
6. Severity of climate or season; inclemency; as, the rigor of the storm; the rigors of winter.
7. Violence; force; fury.
8. 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.