rigor

Từ điển American Heritage Dictionary 4th

rig·or (rĭgʹər)n.
1. Strictness or severity, as in temperament, action, or judgment.
2. A harsh or trying circumstance; hardship. See Synonyms at difficulty.
3. A harsh or cruel act.
4. Medicine. Shivering or trembling, as caused by a chill.
5. Physiology. A state of rigidity in living tissues or organs that prevents response to stimuli.
6. Obsolete. Stiffness or rigidity. [Middle English rigour, from Old French, from Latin rigor, from rigēre, to be stiff. See reig- in Indo-European Roots.]

• Từ đồng nghĩa / Synonyms:
  cogency, validity, rigour, asperity, grimness, hardship, severity, severeness, rigorousness, rigourousness