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Definitions of willful:

adjective:   done by design
Example: "Willful disobedience"

adjective:   by conscious design or purpose
Example: "A willful waste of time"

adjective:   habitually disposed to disobedience and opposition

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Alternative Terms
voluntary deliberate intended intentional purposeful witting purpose-purposelessness free spontaneous uncompelled unforced volitional willing-unwilling bullheaded dogged hardheaded headstrong mulish obstinate pertinacious perverse pigheaded stiff-necked tenacious resist-yield intent malum-in-se moral-turpitude murder attendant-circumstance unemployment-benefit fraudulent esquivalience contumacy malicious-mischief sabotage gross-negligence irresolute leave pervicacious vandalism personal-foul confusion-of-goods disturbance-of-the-peace

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wil6lful , wil7ful , wil7lful , wil8ful , wil8lful , wil9ful , wil9lful , wil,ful , wil,lful , wil.ful , wil.lful , wil/ful , wil/lful , wil[ful , wil[lful , wil]ful , wil]lful , wil'ful , wil'lful , wil;ful , wil;lful , wilaful , wilalful , wilbful , wilblful , wilcful , wilclful , wildful , wildlful , wiljful , wiljlful , wilkful , wilklful , willful , willlful , wilmful , wilmlful , wilnful , wilnlful , wiloful , wilolful , wilpful , wilplful , willul , willful , willeul , willeful , willrul , willrful , willsul , willsful , willtul , willtful , willuul , willuful , willvul , willvful , willyul , willyful , willzul , willzful , willful , willfful , willgul , willgful , willhul , willhful , williul , williful , will0ul , will0ful , will1ul , will1ful , will2ul , will2ful , will3ul , will3ful , will4ul , will4ful , will5ul , will5ful , will6ul , will6ful , will7ul , will7ful , will8ul , will8ful , will9ul , will9ful , will,ul , will,ful , will.ul , will.ful , will/ul , will/ful , will[ul , will[ful , will]ul , will]ful , will'ul , will'ful , will;ul , will;ful , willaul , willaful , willbul , willbful , willcul , willcful , willdul , willdful , willjul , willjful , willkul , willkful , willlul , willlful , willmul , willmful , willnul , willnful , willoul , willoful , willpul , willpful , willfl , willful , willfel , willfeul , willfrl , willfrul , willfsl , willfsul , willftl , willftul , willful , willfuul , willfvl , willfvul , willfyl , willfyul , willfzl , willfzul , willffl , willfful , willfgl , willfgul , willfhl , willfhul , willfil , willfiul , willf0l , willf0ul , willf1l , willf1ul , willf2l , willf2ul , willf3l , willf3ul , willf4l , willf4ul , willf5l , willf5ul , willf6l , willf6ul , willf7l , willf7ul , willf8l , willf8ul , willf9l , willf9ul , willf,l , willf,ul , willf.l , willf.ul , willf/l , willf/ul , willf[l , willf[ul , willf]l , willf]ul , willf'l , willf'ul , willf;l , willf;ul , willfal , willfaul , willfbl , willfbul , willfcl , willfcul , willfdl , willfdul , willfjl , willfjul , willfkl , willfkul , willfll , willflul , willfml , willfmul , willfnl , willfnul , willfol , willfoul , willfpl , willfpul , willfu , willful , willfue , willfuel , willfur , willfurl , willfus , willfusl , willfut , willfutl , willfuu , willfuul , willfuv , willfuvl , willfuy , willfuyl , willfuz , willfuzl , willfuf , willfufl , willfug , willfugl , willfuh , willfuhl , willfui , willfuil , willfu0 , willfu0l , willfu1 , willfu1l , willfu2 , willfu2l , willfu3 , willfu3l , willfu4 , willfu4l , willfu5 , willfu5l , willfu6 , willfu6l , willfu7 , willfu7l , willfu8 , willfu8l , willfu9 , willfu9l , willfu, , willfu,l , willfu. , willfu.l , willfu/ , willfu/l , willfu[ , willfu[l , willfu] , willfu]l , willfu' , willfu'l , willfu; , willfu;l , willfua , willfual , willfub , willfubl , willfuc , willfucl , willfud , willfudl , willfuj , willfujl , willfuk , willfukl , willful , willfull , willfum , willfuml , willfun , willfunl , willfuo , willfuol , willfup , willfupl , iwllful , wlilful , willful , wilflul , willufl , willflu