What does the word rigor mean?

Usage examples for rigor

  1. But it was thought necessary effectually to destroy all dependencies but one; and to show an example of the firmness and rigor with which the new system was to be supported. – The Works of the Right Honourable Edmund Burke, Vol. I. (of 12) by Edmund Burke
  2. Through the intervention of his friends, his release was obtained after two months confinement, but the rigor of prison life had been too much for his feeble frame. – American Prisoners of the Revolution by Danske Dandridge
  3. " It's like the rigor of death itself," she whispered fearfully over her shoulder. – The Dark Star by Robert W. Chambers