n.

1. 严格；严厉；苛刻[U]
2. （生活等的）艰苦；（气候的）严酷[P1][（+of）]
3. 苛刻待遇；苛刻行为[P1]
   He was subjected to the rod in all its rigors in this school.

   他在这所学校里受尽了笞杖体罚之苦。

4. 严密，精确[U]
5. 【医】强直[U]
6. 【医】发烧前的寒战[U]

n.

1. a sudden feeling of cold accompanied by shivering and a rise in temperature, especially at the onset or height of a fever.
2. short for rigor mortis.

n.