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English definition of “wilful”

wilful

adjective uk disapproving (US usually willful)   /ˈwɪl.fəl/ us  
(of something bad) done intentionally or (of a person) determined to do exactly as you want, even if you know it is wrong: The present crisis is the result of years of wilful neglect by the council. They eat huge quantities of sweet and fried foods, in wilful disregard of their health. She developed into a wilful, difficult child.
wilfully
adverb uk (US usually willfully)   /-i/ us  
Some basic safety rules were wilfully ignored.
wilfulness
noun [U] uk (US usually willfulness)   /-nəs/ us  
(Definition of wilful from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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