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English definition of “laborious”

laborious

adjective     /ləˈbɔː.ri.əs/ US  /-ˈbɔːr.i-/
needing a lot of time and effort: a laborious taskComplicated and difficult to doDifficult to understand laboriously     /-li/ adverb He wrote out the list laboriously by hand.Complicated and difficult to doDifficult to understand
(Definition of laborious adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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