Synonyms of willfully

2 Syllables
freely
3 Syllables
consciously, wittingly, designed, headstrongly, doggedly, stolidly, knowingly, mulishly
4 Syllables
purposely, apurpose, meaningfully, purposedly, tumultuously, regardlessly, tenaciously, designedly, bullheadedly, intractably, pigheadedly, resistantly, resolvedly, unyieldingly
5 Syllables
unrelentingly, voluntarily, calculatingly, obdurately, purposively, indomitably, intentionally, purposefully, obstinately, unwaveringly, calculatedly, pertinaciously, contumaciously
6 Syllables
deliberately, premeditatedly, opinionatedly
7 Syllables
premeditatively, inconsiderately