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English definition of “Herculean”

Herculean

adjective     /ˌhɜː.kjʊˈliː.ən/ US  /ˌhɝː-/
needing great strength and determination : a Herculean effort She faces the Herculean task of bringing up four children single-handedly .Complicated and difficult to doDifficult to understand
(Definition of Herculean adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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