wilfully
adverb /ˈwɪlfəli/
  /ˈwɪlfəli/
(especially British English) (North American English usually willfully)
 (disapproving)- deliberately, although you know that what you are doing is wrong故意:故意,尽管您知道自己在做什么是错误的 - They were charged with wilfully neglecting their children.他们被指控故意对孩子疏于照管。 
 
- They were charged with wilfully neglecting their children.