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English definition of “rigorous”

rigorous

adjective (CAREFUL)    /ˈrɪɡ.ər.əs/ US  /-ɚ-/ approving
careful to look at or consider every part of something to make certain it is correct or safe: rigorous testing/checking/methodsAccurate and exactCautious and vigilantPaying attention and being careful rigorously     /-li/ adverb
(Definition of rigorous adjective (CAREFUL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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