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English definition of “strenuous”

strenuous

adjective     /ˈstren.ju.əs/
C2 needing or using a lot of physical or mental effort or energy: He rarely does anything more strenuous than changing the channels on the television. His doctor advised him not to take any strenuous exercise. Strenuous efforts were made throughout the war to disguise the scale of civilian casualties.Effort and expending energyTrying and making an effortComplicated and difficult to doDifficult to understand strenuously     /-li/ adverb He strenuously denies all the allegations against him. Most local residents strenuously object to the building proposals.Effort and expending energyTrying and making an effortComplicated and difficult to doDifficult to understand
(Definition of strenuous adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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