Definition of painstaking adjective from the Oxford Advanced Learner's Dictionary

 

painstaking

 adjective
adjective
BrE BrE//ˈpeɪnzteɪkɪŋ//
 
; NAmE NAmE//ˈpeɪnzteɪkɪŋ//
 
[usually before noun] Describing work
 
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needing a lot of care, effort and attention to detail synonym thorough painstaking research The event had been planned with painstaking attention to detail. See related entries: Describing work
See the Oxford Advanced American Dictionary entry: painstaking