Webster's Revised Unabridged Dictionary · 1913

Willful

Willful , adjective

[Will + full.]

1.
Of set purpose; self-determined; voluntary; as, willful murder. — Foxe
In willful poverty chose to lead his life. — Chaucer
Thou to me Art all things under heaven, all places thou, Who, for my willful crime, art banished hence. — Milton
2.
Governed by the will without yielding to reason; obstinate; perverse; inflexible; stubborn; refractory; as, a willful man or horse.