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rigor

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rigor(US)noun
or Britishrigour/ˈrɪgɚ/
pluralrigors
rigor(US)
noun
or British rigour /ˈrɪgɚ/
pluralrigors
Learner's definition of RIGOR  
rigors [plural] : the difficult and unpleasant conditions or experiences that are associated with something
[noncount] : the quality or state of being very exact, careful, or strict
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