Rigor is something strict, severe or demanding. 1  Harsh and strict treatment in the military for cadets is an example of rigor. 2  Freezing weather and ice are examples of the rigors of winter.  Difficult and challenging academic courses are an example of academic rigor.
The suffix gram means to draw or write. This is used in telegram.
medical Definition of gram 1: a metric unit of mass equal to Â¹/ââââ kilogram and nearly equal to the mass of one cubic centimeter of water at its maximum density â abbreviation g 2: the weight of a gram under standard gravity