willful [ˈwɪlfəl]

例句:

• Willful violators would have faced prison terms and fines.
  来自WSJ
• He displayed a willful ignorance of their plight.
  对于他们的困境他故意装作一无所知.
  
• He's been willful and headstrong from a baby.
  他从小就固执任性.
  
• She was a willful child.
  她是个任性的孩子.
  
• It is now rightly called willful ignorance and arrogance.
  来自SA
• Machi's apparent willful ignorance of HIV irked Manundu.
  来自VOA