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English definition of “painstaking”

painstaking

adjective uk   /ˈpeɪnzˌteɪ.kɪŋ/ us  
extremely careful and correct, and using a lot of effort: It took months of painstaking research to write the book. He was described by his colleagues as a painstaking journalist.Complicated and difficult to doDifficult to understandDetailed and carefulEffort and expending energyTrying and making an effort
(Definition of painstaking from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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