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wilful

[wil-fuh l]
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adjective
  1. willful.
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Related formswil·ful·ly, adverbwil·ful·ness, nounun·wil·ful, adjectiveun·wil·ful·ly, adverbun·wil·ful·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for unwilful

wilful

US willful

adjective
  1. intent on having one's own way; headstrong or obstinate
  2. intentionalwilful murder
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Derived Formswilfully or US willfully, adverbwilfulness or US willfulness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012